JavaScript Forum

**technoguy** · 01-04-2007, 04:29 AM

Is there anyone who can provide me code for validation for numbers only field?

Thank you

**willcode4beer** · 01-04-2007, 11:02 AM

Try this:

Code:

<html>
<head>
<title>Number validator</title>

<style type="text/css">
label {
    display: block;
    float: left;
    width: 6em;
}
</style>

<script type="text/javascript">// <![CDATA[
function validate(formObj){
    var fieldVal = formObj.numField.value;
    var ret = true;
    if( fieldVal.length==0 || (new Number(fieldVal)!=fieldVal) ){
        alert(fieldVal + " is not a number");
        ret = false;
    }
    return ret;
}
// ]]></script>
</head>
<body>

<form onsubmit="validate(this)" action="#">
    <div>
        <label for="numField">Enter number:</label>
        <input type="text" name="numField" id="numField" />
    </div>
    <input type="button" value="validate" onclick="validate(this.form);" />
</form>

</body>
</html>

**vn5ltr** · 01-09-2007, 02:09 AM

Why not use the isNaN function...?
Simple.

**willcode4beer** · 01-09-2007, 09:47 AM

DOH!
good point