simple operator question

I wanna allow user to enter 2 values then i add them up togther

<script type="text/javascript">
var x = prompt("Please enter a value for x","")
var y = prompt("Please enter a value for y"," ")
if (x != null && x != "" && y != null && y != "")
{
var result
eval ("result = x" + "y")
document.write("Your result is " + result)
}
</script>

eg: i key 1 for x and 2 for y the result i get is 12 instead of 3

pls help

first of all, you need to add ; to those lines

second of all, i dont know the answer...

erm...

result=eval(x+y);

?

ok, well now (in Mozilla 1.5) its actually displaying something...but you're right, it is "12"... ummm..

take a look here

you need to use the parseInt function so that the strings are treated as numbers and not just concatanated together

Code:

---

<script type="text/javascript">
var x = prompt("Please enter a value for x","")
var y = prompt("Please enter a value for y"," ")
if (x != null && x != "" && y != null && y != "")
{
var result = eval (parseInt(x) + parseInt(y))
document.write("Your result is " + result)
}
</script>

---

thanks

The eval is not necessary, just
parseInt(x) + parseInt(y)
suffices.