Throwing String Exceptions : Error Exceptions « Development « JavaScript DHTML

Throwing String Exceptions

<TITLE>Throwing a String Exception</TITLE>
var letters = new Array("A","B","C","D","E")
function getLetter(fld) {
    try {
        var inp = parseInt(fld.value, 10)
        if (isNaN(inp)) {
            throw "Entry was not a number."
        if (inp < 1 || inp > 5) {
            throw "Enter only 1 through 5."
        fld.form.output.value = letters[inp-1]
    catch (e)  {
        fld.form.output.value = ""
<H1>Throwing a String Exception</H1>
Enter a number from 1 to 5: 
<INPUT TYPE="text" NAME="input" SIZE=5>
<INPUT TYPE="button" VALUE="Get Letter" onClick=getLetter(this.form.input)>
Matching Letter is:<INPUT TYPE="text" NAME="output" SIZE=5>


Related examples in the same category

1.Catching the 'Object Expected' Error
2.Throwing an Error
3.Catching an Error
4.Controlling Script Errors
5.An Exception Handling Example
6.Nested Exception Handling (This script only works with Internet Explorer 5, Navigator 6, or later browsers)
7.Using the onError Event Handler
8.Throwing an Error Object Exception
9.A Custom Object Exception