Form Validate: is blank, is digit and is integer : Form Validation « Form Control « JavaScript DHTML






Form Validate: is blank, is digit and is integer

  
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<!--
 * +-------------------------------------------------------------------------+
 * | jsPro - Validator Test Page                                             |
 * +-------------------------------------------------------------------------+
 * | Copyright (C) 2001-2003 Stuart Wigley                                   |
 * +-------------------------------------------------------------------------+
 * | This library is free software; you can redistribute it and/or modify it |
 * | under the terms of the GNU Lesser General Public License as published by|
 * | the Free Software Foundation; either version 2.1 of the License, or (at |
 * | your option) any later version.                                         |
 * |                                                                         |
 * | This library is distributed in the hope that it will be useful, but     |
 * | WITHOUT ANY WARRANTY; without even the implied warranty of              |
 * | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser |
 * | General Public License for more details.                                |
 * |                                                                         |
 * | You should have received a copy of the GNU Lesser General Public License|
 * | along with this library; if not, write to the Free Software Foundation, |
 * | Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA             |
 * +-------------------------------------------------------------------------+
 * | Authors:   Stuart Wigley <stuartwigley@yahoo.co.uk>                     |
 * +-------------------------------------------------------------------------+
 * $Id: validator.html,v 1.1 2003/09/19 15:42:46 wigleys Exp $
-->
<html>
    <head>
        <title>jsPro - Validator</title>
        <!-- error.js -->
        <script type="text/javascript">
/**
 * +-------------------------------------------------------------------------+
 * | jsPro - Error                                                           |
 * +-------------------------------------------------------------------------+
 * | Copyright (C) 2001-2003 Stuart Wigley                                   |
 * +-------------------------------------------------------------------------+
 * | This library is free software; you can redistribute it and/or modify it |
 * | under the terms of the GNU Lesser General Public License as published by|
 * | the Free Software Foundation; either version 2.1 of the License, or (at |
 * | your option) any later version.                                         |
 * |                                                                         |
 * | This library is distributed in the hope that it will be useful, but     |
 * | WITHOUT ANY WARRANTY; without even the implied warranty of              |
 * | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser |
 * | General Public License for more details.                                |
 * |                                                                         |
 * | You should have received a copy of the GNU Lesser General Public License|
 * | along with this library; if not, write to the Free Software Foundation, |
 * | Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA             |
 * +-------------------------------------------------------------------------+
 * | Authors:   Stuart Wigley <stuartwigley@yahoo.co.uk>                     |
 * |            Randolph Fielding <gator4life@cinci.rr.com>                  |
 * +-------------------------------------------------------------------------+
 * $Id: error.js,v 1.15 2003/09/22 04:41:10 gator4life Exp $
 */


/**
 * Property used in <code>Error.handleError</code> to specify how errors are
 * reported. Permissable values are:
 *
 * 0    No errors are reported.
 * 1    Report the error name and error message using the status bar of the
 *      active browser window.
 * 2    Report the error name and error message using an alert box.
 * 3    Report the error name, error message and debug message using an alert
 *      box.
 * 4    Report the error name, error message and debug message using a debug
 *      window. An instance of the Debug() class must be available.
 */
Error.prototype.debugLevel = 4;


/**
 * Uses <code>Error.debugLevel</code> to control how errors are reported. If
 * <code>Error.debugLevel</code> is set to 4, you must substitute the name of
 * your <code>Debug()</code> instance for <code>oDebug</code> in the line
 * <code>var jsProDebugWindow = oDebug</code>.
 *
 * @summary             handles thrown exceptions
 * @author              Stuart Wigley
 * @author              Randolph Fielding
 * @version             1.2, 09/03/03
 * @interface           <code>Error.handleError()</code>
 * @requires            <code>Debug.print(vMixedValue, sMessageType)</code>
 * @see                 <code>Debug()</code>
 * @see                 <code>Debug.print()</code>
 */
Error.prototype.handleError = function() {

    var sDebugMessage = this.debug;
    var sErrorMessage = (sDebugMessage) ? sDebugMessage : '';

    switch (this.debugLevel) {
        case 0 :
            break;
        case 1 :
            window.status = this.name + ': ' + this.message;
            break;
        case 2 :
            window.alert(this.name + '\n\n' + this.message);
            break;
        case 3 :
            window.alert(this.name + '\n\n' + this.message + '\n\n' + sErrorMessage);
            break;
        case 4 :
            var jsProDebugWindow = oDebug;
            if (jsProDebugWindow) {
                var oDebugWindow = jsProDebugWindow.debugWindow;
                if (oDebugWindow && !oDebugWindow.closed) {
                    jsProDebugWindow.print(this.name + ' ' + this.message + ' ' + sErrorMessage, 1);
                }
            }
    }
}


/**
 * Creates an object that is a subclass of Error for handling
 * ArrayIndexOutOfBounds exceptions.
 *
 * @author              Stuart Wigley
 * @author              Randolph Fielding
 * @version             1.1, 06/27/03
 * @interface           <code>new ArrayIndexOutOfBoundsException(sMethodName,
 *                      iIndex, iArrayLength)</code>
 * @param sMethodName   the name of the method where the exception was thrown
 * @param iIndex        the index of a hypothetical array member attempting to
 *                      be accessed
 * @param iArrayLength  the length of the array
 */
function ArrayIndexOutOfBoundsException(sMethodName, iIndex, iArrayLength) {

    this.name = 'ArrayIndexOutOfBoundsException';
    this.message = sMethodName + ' has been accessed with an illegal index that is either negative or greater than the size of the array.';
    this.debug = 'Attempting to access index ' + iIndex.toString() + ', but array has an index range of 0 to ' + (iArrayLength - 1).toString() + '.';
}

ArrayIndexOutOfBoundsException.prototype = new Error();


/**
 * Creates an object that is a subclass of Error for handling IllegalArgument
 * exceptions.
 *
 * @author              Stuart Wigley
 * @author              Randolph Fielding
 * @version             1.2, 07/24/03
 * @interface           <code>new IllegalArgumentException(sMethodName,
 *                      vExpectedArgs, iActualArgs)</code>
 * @param sMethodName   the name of the method where the exception was thrown
 * @param vExpectedArgs the number of arguments expected
 * @param iActualArgs   the number of arguments received
 */
function IllegalArgumentException(sMethodName, vExpectedArgs, iActualArgs) {

    this.name = 'IllegalArgumentException';
    this.message = sMethodName + ' has been passed an illegal number of arguments.';
    this.debug = 'Expected ' + vExpectedArgs.toString() + ' argument(s), but received ' + iActualArgs.toString() + ' argument(s).';
}

IllegalArgumentException.prototype = new Error();


/**
 * Creates an object that is a subclass of Error for handling IllegalValue
 * exceptions.
 *
 * @author              Randolph Fielding
 * @version             1.0, 09/22/03
 * @interface           <code>new IllegalValueException(sMethodName,
 *                      sVariableName, vExpectedVal, vActualVal)</code>
 * @param sMethodName   the name of the method where the exception was thrown
 * @param sVariableName the name of the variable containing the illegal value
 * @param vExpectedVal  the value expected in the variable containing the
 *                      illegal value
 * @param vActualVal    the value currently in the variable containing the
 *                      illegal value
 */
function IllegalValueException(sMethodName, sVariableName, vExpectedVal, vActualVal) {

    this.name = 'IllegalValueException';
    this.message = sMethodName + ' has encountered an illegal value in variable ' + sVariableName + '.'
    this.debug = 'Expected a value of ' + vExpectedVal.toString() + ', but contains a value of ' + vActualVal.toString() + '.'
}

IllegalValueException.prototype = new Error();


/**
 * Creates an object that is a subclass of Error for handling
 * MethodNotAvailable exceptions.
 *
 * @author              Stuart Wigley
 * @author              Randolph Fielding
 * @version             1.1, 06/27/03
 * @interface           <code>new MethodNotAvailableException(sMethodName,
 *                      sMethodNameNA)</code>
 * @param sMethodName   the name of the method where the exception was thrown
 * @param sMethodNameNA the name of the method that was not available
 */
function MethodNotAvailableException(sMethodName, sMethodNameNA) {

    this.name = 'MethodNotAvailableException';
    this.message = 'A method has been called that is not available.';
    this.debug = sMethodName + ' attempted to call ' + sMethodNameNA + '.';
}

MethodNotAvailableException.prototype = new Error();


/**
 * Creates an object that is a subclass of Error for handling
 * PropertyNotAvailable exceptions.
 *
 * @author              Randolph Fielding
 * @version             1.1, 08/01/03
 * @interface           <code>new PropertyNotAvailableException(sMethodName,
 *                      sPropNameNA)</code>
 * @param sMethodName   the name of the method where the exception was thrown
 * @param sPropNameNA   the name of the property that was not available
 */
function PropertyNotAvailableException(sMethodName, sPropNameNA) {

    this.name = 'PropertyNotAvailableException';
    this.message = 'A property has been accessed that is not available.';
    this.debug = sMethodName + ' attempted to access ' + sPropNameNA + '.';
}

PropertyNotAvailableException.prototype = new Error();


/**
 * Creates an object that is a subclass of Error for handling TypeMismatch
 * exceptions.
 *
 * @author              Stuart Wigley
 * @author              Randolph Fielding
 * @version             1.2, 07/24/03
 * @interface           <code>new TypeMismatchException(sMethodName,
 *                      sExpectedType, sActualType)</code>
 * @param sMethodName   the name of the method where the exception was thrown
 * @param sExpectedType the name of the expected type of an argument
 * @param sActualType   the name of the actual type of an argument
 */
function TypeMismatchException(sMethodName, sExpectedType, sActualType) {

    this.name = 'TypeMismatchException';
    this.message = sMethodName + ' has been passed an argument with an illegal or inappropriate type.';
    this.debug = 'Expected an argument with a type of ' + sExpectedType + ', but received an argument with a type of ' + sActualType + '.';
}

TypeMismatchException.prototype = new Error();


/**
 * Creates an object that is a subclass of Error for handling Unknown
 * exceptions.
 *
 * @author              Stuart Wigley
 * @author              Randolph Fielding
 * @version             1.1, 06/27/03
 * @interface           <code>new UnknownException(sMethodName)</code>
 * @param sMethodName   the name of the method where the exception was thrown
 */
function UnknownException(sMethodName) {

    this.name = 'UnknownException';
    this.message = 'An unknown error has occurred in ' + sMethodName + '.';
}

UnknownException.prototype = new Error();
        </script>
        <!-- debug.js -->
        <script type="text/javascript">
/**
 * +-------------------------------------------------------------------------+
 * | jsPro - Debug                                                           |
 * +-------------------------------------------------------------------------+
 * | Copyright (C) 2001-2003 Stuart Wigley                                   |
 * +-------------------------------------------------------------------------+
 * | This library is free software; you can redistribute it and/or modify it |
 * | under the terms of the GNU Lesser General Public License as published by|
 * | the Free Software Foundation; either version 2.1 of the License, or (at |
 * | your option) any later version.                                         |
 * |                                                                         |
 * | This library is distributed in the hope that it will be useful, but     |
 * | WITHOUT ANY WARRANTY; without even the implied warranty of              |
 * | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser |
 * | General Public License for more details.                                |
 * |                                                                         |
 * | You should have received a copy of the GNU Lesser General Public License|
 * | along with this library; if not, write to the Free Software Foundation, |
 * | Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA             |
 * +-------------------------------------------------------------------------+
 * | Authors:   Stuart Wigley <stuartwigley@yahoo.co.uk>                     |
 * |            Randolph Fielding <gator4life@cinci.rr.com>                  |
 * +-------------------------------------------------------------------------+
 * $Id: debug.js,v 1.6 2003/09/22 05:07:41 gator4life Exp $
 */


/**
 * Creates an object that opens a window for debugging.
 *
 * @author              Stuart Wigley
 * @author              Randolph Fielding
 * @version             1.1, 09/05/03
 * @interface           <code>new Debug()</code>
 */
function Debug() {

    this.debugWindow = window.open('../debug/debug.html', 'debug', 'width=400,height=600,resizable=yes,scrollbars=yes');
}


/**
 * Clears the contents of the debug window.
 *
 * @author              Stuart Wigley
 * @author              Randolph Fielding
 * @version             1.1, 09/05/03
 * @interface           <code>Debug.clear()</code>
 * @return              <code>true</code> if no exceptions are encountered
 * @return              <code>null</code> if an exception is encountered
 * @throws              IllegalArgumentException
 * @throws              UnknownException
 */
Debug.prototype.clear = function() {

    try {

        var vError = null;
        var iNumArguments = arguments.length;

        if (iNumArguments != 0) {
            throw vError = new IllegalArgumentException('Debug.clear', 0, iNumArguments);
        }

        var oMessageContainer = document.getElementById('messageContainer');

        if (!oMessageContainer) {
            throw vError = new UnknownException('Debug.clear');
        }

        while (oMessageContainer.hasChildNodes()) {
            oMessageContainer.removeChild(oMessageContainer.firstChild);
        }
    }
    catch (vError) {

        if (vError instanceof Error) {
            vError.handleError();
        }
    }
    finally {

        return vError ? null : true;
    }
}


/**
 * Displays content within the debug window.
 *
 * @author              Stuart Wigley
 * @author              Randolph Fielding
 * @version             1.2, 09/05/03
 * @interface           <code>Debug.print(vMixedValue)</code>
 * @interface           <code>Debug.print(vMixedValue, iMessageType)</code>
 * @param vMixedValue   content to be displayed within the debug window
 * @param iMessageType  an integer representing the type of content to display
 *                      within the debug window (information: 0; error: 1)
 *                      (optional)
 * @return              <code>true</code> if no exceptions are encountered
 * @return              <code>null</code> if an exception is encountered
 * @throws              IllegalArgumentException
 * @throws              IllegalValueException
 * @throws              TypeMismatchException
 * @throws              UnknownException
 */
Debug.prototype.print = function(vMixedValue) {

    try {

        var vError = null;
        var iNumArguments = arguments.length;
        var iMessageType = 0;

        if ((iNumArguments < 1) || (iNumArguments > 2)) {
            throw vError = new IllegalArgumentException('Debug.print', '1 or 2', iNumArguments);
        } else if (iNumArguments == 2) {
            iMessageType = arguments[1];
        }

        if ((typeof iMessageType != 'number') || (iMessageType.toString().indexOf('.') != -1)) {
            throw vError = new TypeMismatchException('Debug.print', 'integer', typeof iMessageType);
        }

        if ((iMessageType != 0) && (iMessageType != 1)) {
            throw vError = new IllegalValueException('Debug.print', 'iMessageType', '0 or 1', iMessageType);
        }

        var oDebugWindow = this.debugWindow;

        if (!oDebugWindow || oDebugWindow.closed) {
            throw vError = new UnknownException('Debug.print');
        }

        var oDocument = oDebugWindow.document;

        if (!oDocument) {
            throw vError = new UnknownException('Debug.print');
        }

        var oMessageContainer = oDocument.getElementById('messageContainer');

        if (!oMessageContainer) {
            throw vError = new UnknownException('Debug.print');
        }

        var oTitleRow = oDocument.createElement('tr');
        var oTitleCell = oDocument.createElement('td');
        var oBodyRow = oDocument.createElement('tr');
        var oBodyCell = oDocument.createElement('td');

        if (!oTitleRow || !oTitleCell || !oBodyRow || !oBodyCell) {
            throw vError = new UnknownException('Debug.print');
        }

        var oTitleRowStyle = oTitleRow.style;

        if (oTitleRowStyle) {
            oTitleRowStyle.backgroundColor = '#EEE';
            oTitleRowStyle.fontWeight = 700;
        }

        var sOutputString = vMixedValue.toString();
        var sTitle = 'info';
        var sBody = sOutputString;

        if (iMessageType == 1) {
            sTitle = sOutputString.match(/\w+/);
            sBody = sOutputString.replace(/\w+/, '');
            var oBodyCellStyle = oBodyCell.style;
            if (oBodyCellStyle) {
                oBodyCell.style.backgroundColor = '#FCC';
            }
        }

        oMessageContainer.appendChild(oTitleRow);
        oTitleRow.appendChild(oTitleCell);
        oTitleCell.appendChild(oDocument.createTextNode(sTitle));
        oMessageContainer.appendChild(oBodyRow);
        oBodyRow.appendChild(oBodyCell);
        oBodyCell.appendChild(oDocument.createTextNode(sBody));
        oDebugWindow.focus();
    }
    catch (vError) {

        if (vError instanceof Error) {
            vError.handleError();
        }
    }
    finally {

        return vError ? null : true;
    }
}
        </script>
        <!-- test.js -->
        <script type="text/javascript">
/**
 * +-------------------------------------------------------------------------+
 * | jsPro - Test                                                            |
 * +-------------------------------------------------------------------------+
 * | Copyright (C) 2001-2003 Stuart Wigley                                   |
 * +-------------------------------------------------------------------------+
 * | This library is free software; you can redistribute it and/or modify it |
 * | under the terms of the GNU Lesser General Public License as published by|
 * | the Free Software Foundation; either version 2.1 of the License, or (at |
 * | your option) any later version.                                         |
 * |                                                                         |
 * | This library is distributed in the hope that it will be useful, but     |
 * | WITHOUT ANY WARRANTY; without even the implied warranty of              |
 * | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser |
 * | General Public License for more details.                                |
 * |                                                                         |
 * | You should have received a copy of the GNU Lesser General Public License|
 * | along with this library; if not, write to the Free Software Foundation, |
 * | Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA             |
 * +-------------------------------------------------------------------------+
 * | Authors:   Stuart Wigley <stuartwigley@yahoo.co.uk>                     |
 * |            Randolph Fielding <gator4life@cinci.rr.com>                  |
 * +-------------------------------------------------------------------------+
 * $Id: test.js,v 1.6 2003/09/15 05:07:09 gator4life Exp $
 */


/**
 * Creates an object that provides methods for testing all jsPro libraries.
 *
 * @author              Stuart Wigley
 * @version             1.0, 07/24/03
 * @interface           <code>new Test()</code>
 */
function Test() { }


/**
 * Evaluates and returns the result of a jsPro method using assumptions about
 * the structure and ids of HTML elements in the jsPro HTML test files.
 *
 * @author              Stuart Wigley
 * @author              Randolph Fielding
 * @version             1.1, 08/20/03
 * @interface           <code>Test.evaluateMethod(oButton, sClass)</code>
 * @param oButton       the HTML input-button element that is clicked
 * @param sClass        the name of the jsPro class instance being tested
 * @return              the result of attempting to evaluate a jsPro method
 * @return              <code>null</code> if an exception is encountered
 * @throws              IllegalArgumentException
 * @throws              TypeMismatchException
 */
Test.prototype.evaluateMethod = function(oButton, sClass) {

    try {

        var vError = null;
        var iNumArguments = arguments.length;

        if (iNumArguments != 2) {
            throw vError = new IllegalArgumentException('Error.evaluateMethod', 2, iNumArguments);
        }

        if (typeof oButton != 'object') {
            throw vError = new TypeMismatchException('Error.evaluateMethod', 'object', typeof oButton);
        }

        if (typeof sClass != 'string') {
            throw vError = new TypeMismatchException('Error.evaluateMethod', 'string', typeof sClass);
        }

        var sMethodName = oButton.id;
        var oInput1 = document.getElementById(sMethodName + '1');
        var oInput2 = document.getElementById(sMethodName + '2');
        var oInput3 = document.getElementById(sMethodName + '3');
        var oOutput = document.getElementById(sMethodName + 'Result');
        var sArguments = '';

        if (oInput1) {
            var sInput1Value = oInput1.value;
            if (sInput1Value != '') {
                var fInput1Value = parseFloat(sInput1Value);
                sArguments += (isNaN(fInput1Value)) ? '\'' + sInput1Value + '\'' : fInput1Value;
            }
        }

        if (oInput2) {
            var sInput2Value = oInput2.value;
            if (sInput2Value != '') {
                var fInput2Value = parseFloat(sInput2Value);
                sArguments += (isNaN(fInput2Value)) ? ', \'' + sInput2Value + '\'' : ', ' + fInput2Value;
            }
        }

        if (oInput3) {
            var sInput3Value = oInput3.value;
            if (sInput3Value != '') {
                var fInput3Value = parseFloat(sInput3Value);
                sArguments += (isNaN(fInput3Value)) ? ', \'' + sInput3Value + '\'' : ', ' + fInput3Value;
            }
        }

        var vResult = eval(sClass + '.' + sMethodName + '(' + sArguments + ')');
    }
    catch (vError) {

        if (vError instanceof Error) {
            vError.handleError();
        }
    }
    finally {

        if (oOutput) {
            oOutput.value = vResult;
        }
    }
}
        </script>
        <!-- validator.js -->
        <script type="text/javascript">
/**
 * +-------------------------------------------------------------------------+
 * | jsPro - Validator                                                       |
 * +-------------------------------------------------------------------------+
 * | Copyright (C) 2001-2003 Stuart Wigley                                   |
 * +-------------------------------------------------------------------------+
 * | This library is free software; you can redistribute it and/or modify it |
 * | under the terms of the GNU Lesser General Public License as published by|
 * | the Free Software Foundation; either version 2.1 of the License, or (at |
 * | your option) any later version.                                         |
 * |                                                                         |
 * | This library is distributed in the hope that it will be useful, but     |
 * | WITHOUT ANY WARRANTY; without even the implied warranty of              |
 * | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser |
 * | General Public License for more details.                                |
 * |                                                                         |
 * | You should have received a copy of the GNU Lesser General Public License|
 * | along with this library; if not, write to the Free Software Foundation, |
 * | Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA             |
 * +-------------------------------------------------------------------------+
 * | Authors:   Stuart Wigley <stuartwigley@yahoo.co.uk>                     |
 * |            Randolph Fielding <gator4life@cinci.rr.com>                  |
 * +-------------------------------------------------------------------------+
 * $Id: validator.js,v 1.2 2003/09/22 03:17:34 gator4life Exp $
 */


/**
 * Creates an object that provides methods for performing boolean validations.
 *
 * @author              Stuart Wigley
 * @version             1.0, 09/19/03
 * @interface           <code>new Validator()</code>
 */
function Validator() { }


/**
 * Determine if the specified value is an empty string or a string composed of
 * only whitespace characters.
 *
 * @summary             is blank string?
 * @author              Stuart Wigley
 * @author              Randolph Fielding
 * @version             1.1, 09/21/03
 * @interface           <code>Validator.isBlankString(vValue)</code>
 * @param vValue        a value of any datatype
 * @return              <code>true</code> if <code>vValue</code> is a string
 *                      and is either empty or composed of only whitespace
 *                      characters
 * @return              <code>false</code> if <code>vValue</code> is either
 *                      not a string or is not an empty string and not a
 *                      string composed of only whitespace characters
 * @return              <code>null</code> if an exception is encountered
 * @throws              IllegalArgumentException
 */
Validator.prototype.isBlankString = function(vValue) {

    try {

        var vError = null;
        var iNumArguments = arguments.length;

        if (iNumArguments != 1) {
            throw vError = new IllegalArgumentException('Validator.isBlankString', 1, iNumArguments);
        }

        var bIsBlankString = (typeof vValue != 'string') ? false : (vValue.match(/\S/g)) ? false : true;
    }
    catch (vError) {

        if (vError instanceof Error) {
            vError.handleError();
        }
    }
    finally {

        return vError ? null : bIsBlankString;
    }
}


/**
 * Determine if the specified value is a single digit.
 *
 * @summary             is single digit?
 * @author              Stuart Wigley
 * @author              Randolph Fielding
 * @version             1.1, 09/21/03
 * @interface           <code>Validator.isDigit(vValue)</code>
 * @param vValue        a value of any datatype
 * @return              <code>true</code> if <code>vValue</code> is a number
 *                      and a single digit
 * @return              <code>false</code> if <code>vValue</code> is either
 *                      not a number or is not a single digit
 * @return              <code>null</code> if an exception is encountered
 * @throws              IllegalArgumentException
 */
Validator.prototype.isDigit = function(vValue) {

    try {

        var vError = null;
        var iNumArguments = arguments.length;

        if (iNumArguments != 1) {
            throw vError = new IllegalArgumentException('Validator.isDigit', 1, iNumArguments);
        }

        var bIsDigit = (typeof vValue != 'number') ? false : ((vValue > 9) || (vValue.toString().length != 1)) ? false : true;
    }
    catch (vError) {

        if (vError instanceof Error) {
            vError.handleError();
        }
    }
    finally {

        return vError ? null : bIsDigit;
    }
}


/**
 * Determine if the specified value is an integer.
 *
 * @summary             is integer?
 * @author              Stuart Wigley
 * @author              Randolph Fielding
 * @version             1.1, 09/21/03
 * @interface           <code>Validator.isInteger(vValue)</code>
 * @param vValue        a value of any datatype
 * @return              <code>true</code> if <code>vValue</code> is a number
 *                      and an integer
 * @return              <code>false</code> if <code>vValue</code> is either
 *                      not a number or is not an integer
 * @return              <code>null</code> if an exception is encountered
 * @throws              IllegalArgumentException
 */
Validator.prototype.isInteger = function(vValue) {

    try {

        var vError = null;
        var iNumArguments = arguments.length;

        if (iNumArguments != 1) {
            throw vError = new IllegalArgumentException('Validator.isInteger', 1, iNumArguments);
        }

        var bIsInteger = (typeof vValue != 'number') ? false : (vValue.toString().indexOf('.') != -1) ? false : true;
    }
    catch (vError) {

        if (vError instanceof Error) {
            vError.handleError();
        }
    }
    finally {

        return vError ? null : bIsInteger;
    }
}
        </script>        
        <script type="text/javascript">
            var oTest = new Test();
            var oDebug = new Debug();
            var oValidator = new Validator();
        </script>
    </head>
    <body>
        <table>
            <tbody>
                <tr>
                    <td>Validator.isBlankString()</td>
                    <td><input id="isBlankString1" name="input" type="text" size="5" /></td>
                    <td><input id="isBlankString" type="button" value="Calculate &gt;" onclick="oTest.evaluateMethod(this, 'oValidator')" /></td>
                    <td><input id="isBlankStringResult" name="output" type="text" size="30" readonly="readonly" /></td>
                </tr>
                <tr>
                    <td>Validator.isDigit()</td>
                    <td><input id="isDigit1" name="input" type="text" size="5" /></td>
                    <td><input id="isDigit" type="button" value="Calculate &gt;" onclick="oTest.evaluateMethod(this, 'oValidator')" /></td>
                    <td><input id="isDigitResult" name="output" type="text" size="30" readonly="readonly" /></td>
                </tr>
                <tr>
                    <td>Validator.isInteger()</td>
                    <td><input id="isInteger1" name="input" type="text" size="5" /></td>
                    <td><input id="isInteger" type="button" value="Calculate &gt;" onclick="oTest.evaluateMethod(this, 'oValidator')" /></td>
                    <td><input id="isIntegerResult" name="output" type="text" size="30" readonly="readonly" /></td>
                </tr>
            </tbody>
        </table>
    </body>
</html>


           
         
    
  








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