Javascript "live text-field"

[Eax]

Hi

I'm trying to make a Form Field where the user enters a certain number and when he/she has entered a real number Javascript does some calculations on the number and then show the result on the right of the text-field.

How can I achieve this?
Thanks in advance :)

[turb_]

-snip-

forgot what section i was in

[Eax]

Found out how to do it :)

	<script type="text/javascript">
	function is_int(value){
		if((parseFloat(value) == parseInt(value)) && !isNaN(parseInt(value))){
			return true;
		} else {
			return false;
		} 
	}
	
	var you_have = 200;
	
	function changeText2(){
		var userInput = document.getElementById('userInput').value;
		if(is_int(userInput) ){
			if(userInput > you_have){
				document.getElementById('boldStuff2').innerHTML = "Nope";
				} else {
				document.getElementById('boldStuff2').innerHTML = userInput;
			}
		}
		else {
			document.getElementById('boldStuff2').innerHTML = "Nope";
		}
	}
</script>
<b id='boldStuff2'></b><br>
<input type='text' id='userInput' value='' onkeyup="changeText2()" />

This also checks if it's an integer (at least theoretically.. Doesn't actually work.)

[turb_]

Just use regex to see if it matches /^[0-9]+$/

[wutanggrenad]

What is the point of this?

I'm assuming "you_have" is just for testing or something?

turb_ is right, regex would work the best

[nivek]

Ajax?