Auto focus textfield : TextField « Form Control « JavaScript DHTML

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JavaScript DHTML » Form Control » TextField 
Auto focus textfield
  
<html>
<head>
<SCRIPT LANGUAGE="JavaScript"
function autofocus(field, limit, next, evt) {
    evt = (evt? evt : event;
    var charCode = (evt.charCode? evt.charCode : ((evt.keyCode? evt.keyCode : 
        ((evt.which? evt.which : 0));
    if (charCode > 31 && field.value.length == limit) {
        field.form.elements[next].focus();
    }
}
</SCRIPT
</head>
<body>
<form>
Credit Card Number:
<input type="text" name="cc1" size="5" maxlength="4" 
    onkeypress="return numeralsOnly(event)" 
    onkeyup="autofocus(this, 4, 'cc2', event)">&nbsp;&nbsp;
<input type="text" name="cc2" size="5" maxlength="4" 
    onkeypress="return numeralsOnly(event)" 
    onkeyup="autofocus(this, 4, 'cc3', event)">&nbsp;&nbsp;
<input type="text" name="cc3" size="5" maxlength="4" 
    onkeypress="return numeralsOnly(event)" 
    onkeyup="autofocus(this, 4, 'cc4', event)">&nbsp;&nbsp;
<input type="text" name="cc4" size="5" maxlength="4" 
    onkeypress="return numeralsOnly(event)">
</form>    
</body>
</html>


           
         
    
  
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21.Compound Interest Calculator
22.Resetting a Text Object to Default Value
23.Getting and Setting a Text Object's Value
24.Passing a Text Object (as this) to the Function
25.Text Object Select and Focus
26.Data Validation via an onChange event Handler
27.Add textfield dynamically into HTML
28. Firing the onSame Event (FireFox)
29.Numerals Only
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32.If the textfield has been changed
33.Check if text field input is a number
34.Call select method to highlight the text field
35.Check if a text field is empty
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37.Getting and Setting a Text Object's value Property
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