Field value is a number

[vasilek]

Hello. This was probably asked before, but it doesn't come up on the top of search results.

How to check if the value in the field is a number?


I would like to prohibit entering everything but numbers into quantity field.

Thank you.

 

[Supra]

Try this:

<script>
<!--
function KillLetters() {
   if (event.keyCode < 48 || event.keyCode > 57) {
       event.keyCode = 0;
   }
}
//-->
</script>

<input type="text" onkeyup="KillLetters()">

 

[GUJUm0deL]

You can also try:

<script>
function onlyNum() {
  var Gm = document.form1;
  if(isNaN(Gm.field1.value)) {
    alert("Only numbers please");
    return false;
  }
}
</script>
...
...
<input type="text" name="field1" onBlur="return onlyNum();">

[sub]
____________________________________
Just Imagine.

http://www.imajinarts.com

[sub]

 

[BillyRayPreachersSon]

I would go with GUJUm0deL's solution, as Supra's will not let you enter valid numbers such as "1.5", "2.3", etc.

Dan