Detecting decimal places

[Koobi]

Hi,
I'm not too good with JavaScript, I'm trying to figure out how I can detect if a user input in a text field has more than two decimal places.

For example:
1. If user inputs 10.555, I would trigger an error
2. If user inputs 4.34, this should be fine
3. If user inputs 1.2 this would be fine too
4. If the user inputs 7, this is fine



Any help?
Thanks for your time

[nogray]

You can use the indexOf() method
[code]
<script language="javascript">
function check_field(){
val = document.getElementById('tst').value;

if (val.indexOf(".") < val.length - 3){
alert("error");
}
else {
alert("good");
}
}
</script>
<input type="text" id="tst" name="tst" />
[/code]

[Koobi]

Great, thanks for that :)

Seems to work fine.