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Enter Numeric Values In Textbox

08.25.2009
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        This code restricts the user from accidentally typing characters into a, say, phone number field...

The javascript goes like:
function isNumber(e)
{
    var code, num, regex;
    
    code = e.keyCode;
    num = String.fromCharCode(code);
    regex = /\d/;
    return regex.test(num);
}

The html code goes like:
<input name="txtPhone" type="text" id="txtPhone" onkeypress="javascript:return isNumber(event)" style="width:195px;" />

For firefox/netscape/opera instead of <b>window.event.keyCode</b> use <b>window.event.which</b>