For Loop repeats first loop twice

I have this for loop, and it seems to be repeating the first loop twice (x=0) 开发者_开发技巧and then not doing the last one (x=2)

for (x=0;x<=2;x++)
    {
        if (document.getElementById("sub"+catCount+x).value != "")
        {
            if (nonums.test(document.getElementById("sub"+catCount+x).value))
            {
                total = total + parseFloat(document.getElementById("sub"+catCount+x).value);
            }
        }
        alert(x);
    }

In other words, I get two alert boxes with "0" in them, then one with "1" in it, and that's it.

Can anyone tell me what I'm not seeing here? Why doesn't it just progress through the loop normally (0,1,2)?

that is literally the only spot I use the variable x on any page.

It works for me.

for (x=0;x<=2;x++)
{
  alert(x);
}

You can test it at console.

I don't think you want the variable x to be global in scope. Try it with the "var" keyword:

for (var x=0;x<=2;x++)
...

I can paste this in my address bar and it will produce 0, 1, 2.

javascript:for (var x=0;x<=2;x++) {alert(x);}

I tried it in IE, FF and Chrome.