checking a variable is numeric

[OhLordy]

How can I check if a supplied variable is numeric?
Thank you in advance.
Rob

[SniperX]

Hi you might wanna try this

<script>
<!--
function checkNumberic() {
var num = document.formname.inputname.value;

if (isNaN(num)) { alert("WARNING: Input must be numeric!!"); return false; }
return true;
}
-->
</script>

isNaN() returns 1 if the input consisted of letters
and returns 0 if the input was numerical.

Hope I helped
MW:D

[SniperX]

Thanks for pointing out my mistake,
It is always good to know where you went wrong.

But is it neccessary to use the Number() function - because my way does work, or is number coding standard?

[SniperX]

Thanks for clearing that up.

Kind Regards
MW