textbox field problem

**Yusuf_01** · 04-08-2012 09:22 AM

I need to code one of my field to accept only numbers and the maximum number should be 3. Howto achieve that? I'm still learning.

**WolfShade** · 04-08-2012 10:44 AM

HTML 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">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>
<script type="text/javascript">
function zero_three_only(txt) {
// Allows only numbers 0-3 to be entered into a text or textarea
	var allowOnly = /^[0123]{1,}$/g;
	if (txt.value.match(allowOnly) === null) {
		txt.value = txt.value.substr(0,(txt.value.length-1));
		}
	}
    
   
</script>
</head>

<body>
<form>
<textarea name="thisText" onKeyUp="return zero_three_only(this);"></textarea>
</form>
</body>
</html>

**xelawho** · 04-08-2012 01:59 PM

Code:

<input type='text' onkeydown="oldval=this.value" onkeyup="if(isNaN(this.value)||this.value[this.value.length-1]>3){this.value=oldval}" />

**Yusuf_01** · 04-24-2012 10:00 PM

Its not working as it should. Normally it is a textbox to input grade 0-100 and the number should be in that range. How to do that?

**xelawho** · 04-24-2012 11:39 PM

Code:

<input type='text' onkeyup="if(isNaN(this.value)||this.value>100){this.value=''}" />

**Yusuf_01** · 04-25-2012 12:46 PM

xelawho
its doesn't work. it still accepts 101 which infact should have been only between 0-100

**xelawho** · 04-25-2012 01:24 PM

Originally Posted by Yusuf_01

it still accepts 101 which infact should have been only between 0-100

tested in IE, FF, Chrome and Safari - any number entered over 100 gets deleted.

either you're using some funky browser (not so likely), your implementation is bad (quite likely) or you have a conflict with some other script that is running (who knows?)

maybe you should show the code you're using?

**Yusuf_01** · 04-25-2012 10:08 PM

Yeah any numbers after 100 is deleted automatically with the code only. I tested just now. But when i put it on my form, it accepts any numbers with three char

**xelawho** · 04-25-2012 11:40 PM

Originally Posted by xelawho

maybe you should show the code you're using?

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