I m trying to retrieve the width of an div for my function with javascript:

```
#areaDraw {
margin-top:50px;
width: 50%;
min-height: 100%;
z-index: 1000;
}

```

and the function:

```
 Event.add(window, "resize", function() {
    sketch.resize(document.getElementById("areaDraw").style.width,   window.innerHeight);
}).listener();

```

somehow javascript always returns 0 for the width of the div(areaDraw)

so whats wrong with:

```
document.getElementById("areaDraw").style.width

```