validate fields for numeric values only

[zobernjik]

Hello guys,

How can I validate that users have entered text or anything else for that matter and give them a pop up message informing they can only enter numbers.

I am new to this as you can see by my question,I hope somebody can help.

Regards

[Philip M]

Here is an example:-

<tr>
<td><font face="Arial"><em><b>Club Membership No. (if applicable)</b></em></font></td>
<td><input type="text" size="8" maxlength="8" name="MemNumber" onblur="if(/\D/g.test(this.value)){alert('Only current Club membership numbers are valid in this box. ');this.value='';this.focus()}; </font></td></tr>

[Kylena]

Here's a script that works the same as Philip's.

var f = document.forms[0]

var v = f.NumField.value
for (i=0; i<v.length; i++)
{
	if ((v.charCodeAt(i)<48 || v.charCodeAt(i)>57) && v.charCodeAt(i) !== 44 ) 
	{
	alert ( "This must be numeric." )
	f.NumField.value = "";
	f.NumField.focus()
	return false
	}
}

[Garadon]

if(parseFloat(Field.value,10)==Field.value){}
or
if(parseInt(Field.value,10)==Field.value){}

[liorean]

parseFloat doesn't need that second argument of 10 since it may only take decimal numbers, but the parseInt needs it.

[glenngv]

parseFloat() has no radix parameter unlike parseInt(). It always parse numbers in base 10

[liorean]

Originally Posted by glenngv

parseFloat() has no radix parameter unlike parseInt(). It always parse numbers in base 10

Beat you to it

[glenngv]