Thread: JavaScript for user enter only number.

I am using JavaScript for validation for my form. In my form one mobile no field is there in this field user only enter number if the user enter any word it will give the error message. If you have any sample code then let me know that. It is highly appreciated.

Code:

function numbersonly(e, decimal) {
var key;
var keychar;
if (window.event) {
   key = window.event.keyCode;
}
else if (e) {
   key = e.which;
}
else {
   return true;
}
keychar = String.fromCharCode(key);
if ((key==null) || (key==0) || (key==8) ||  (key==9) || (key==13) || (key==27) ) {
   return true;
}
else if ((("0123456789").indexOf(keychar) > -1)) {
   return true;
}
else if (decimal && (keychar == ".")) { 
  return true;
}
else
   return false;
}

Code:

<script language="javascript">
function forceNumber(event){ 
var keyCode = event.keyCode ? event.keyCode : event.charCode;
if((keyCode < 48 || keyCode > 58) && keyCode != 8 && keyCode != 9 && keyCode != 32 && keyCode != 37 && keyCode != 39 && keyCode != 40 && keyCode != 41 && keyCode != 43 && keyCode != 45 && keyCode != 46)
return false;
}
</script>