Disable comas, dot (.) [Archive]

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petertran123

08-09-2002, 02:49 PM

Hello All,

I have a form with name and address. I wanted to validate the field for not allowing enter comas(,) or dot(.) and Amp. (&) . The field only except Characters and Numerics. Is there anyway i can do it.. Please help for codings. Thanks

requestcode

08-09-2002, 04:25 PM

You could set up a regular expression to do this. Here is an example:
re1=/[^a-zA-Z0-9]/
function checknum1()
{
myvar1=document.form_name.field_name.value
if(myvar1.match(re1)||myvar1.length==0)
{
alert("Invalid!")
}
else
{alert("Correct!")}
}

adios

08-10-2002, 12:20 AM

I always like to filter the input in advance rather than validating/correcting later. The only question: the dot character is often used in addresses....

<html>
<head>

<script type="text/javascript">

function filter(e) {
var chr;
if (e && e.keyCode) chr = String.fromCharCode(e.keyCode);
if (e&& e.which) chr = String.fromCharCode(e.which);
if (chr) return /[a-zA-Z0-9]/.test(chr);
else return true;
}

</script>
</head>
<body>
<form>
<input onkeypress="return filter(event)">
</form>
</body>
</html>

To allow a period:

/[a-zA-Z0-9\.]/

petertran123

08-12-2002, 02:20 PM

Thank you very much for your help..