Filtered Textbox (REGEX)

[dke01]

Hi,

I'm trying to only allow limited characters to be entered into a textbox using a regex I have the correct expression but cannot seem to get it to work?

<script language="javascript" type="text/javascript">


function myNumberFilter(txb) {

  var filter = new RegExp("-{0,1}[0-9 \,]*");
  if (!filter.test(txb.value))   txb.length -= 1;


}

</script>

<form>
<input type="text" id="test" onKeyUp="myNumberFilter(this);"  />
 </form>

[Master_script_maker]

try:

var filter = new RegExp("[-]?[0-9 \,]*");

[dke01]

Thanks I got it working with the following code

 var re = new RegExp("-{0,1}[0-9]*$","gi"); 
        var m = re.exec(txb.value);
        
      if (m != txb.value) 
         txb.value = txb.value.substring(0, txb.value.length-1);
      
      }