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isNumeric function

i found this code in a website and it works but the problem is when i press TAB and BACKSPACE it also give me the error message
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  1. <script type='text/javascript'>
  2. function isNumeric(elem, helperMsg){
  3.     var numericExpression = /^[0-9]+$/;
  5.     if(elem.value.match(numericExpression)){
  6.         return true;
  7.     }else{
  8.         alert(helperMsg);
  9.         elem.focus();
  10.         return false;
  11.     }
  12. }
  13. </script>
does any body have any idea what can i do or what additional things could be added to this code

Nov 18 '07 #1
3 2513
1,351 Expert 1GB
this is a javascript question and not a php question.
Nov 18 '07 #2
5,821 Expert 4TB
Heya, Isaac.

What is an example of what you get if you alert(elem.value) instead of helperMsg?
Nov 18 '07 #3
5,390 Expert Mod 4TB
hi ...

i assume the the function is called 'onkeypress'-event? so in that case the keypress-handler has to be adapted ... could you post the code for it?

kind regards
Nov 19 '07 #4

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