allow only numeric data including decimal

**abs0lut** · 01-10-2009, 12:38 AM

the user cannot type letters or special characters into the input field.
could you please help me?

**Snookerman** · 01-10-2009, 09:43 AM

These threads should be helpful:
http://www.cambiaresearch.com/c4/029c978b-aac5-472e-97a8-95b256f5febd/How-Can-I-Use-Javascript-to-Allow-Only-Numbers-to-Be-Entered-in-a-TextBox.aspx
http://www.go4expert.com/forums/showthread.php?t=2359

Good luck!

**rangana** · 01-10-2009, 10:11 AM

Code:

<input type="text" onkeyup="this.value=!this.value.match(/[\d.]$/)?this.value.substring(0,this.value.length-1):this.value;">

**vwphillips** · 01-10-2009, 11:23 AM

for +ve and -ve floating point

Code:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">

<head>
  <title></title>
</head>
<script language="JavaScript" type="text/javascript">
/*<![CDATA[*/

function zxcFloat(obj){
 obj.value=obj.value.replace(/[^-?\d\.]/g,'');
 obj.value=parseFloat(obj.value);
}
/*]]>*/
</script>
<body>
<input name="" onblur="zxcFloat(this)"/>
</body>

</html>

**abs0lut** · 01-10-2009, 11:57 PM

if the user press any letter/special characters, it will not appear in the textbox.
thanks

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