Get div's top class-property value

[JerAb]

What i am trying to do, in theory is fairly simple. I have a div:

#MyDiv {
	top:13px;
}

And i simply need to get the value of top...i had assumed something like

top = parseInt(document.getElementById("MyDiv").style.top);

would work but it doesnt seem to

Any help is much appreciated - im sure its something simple.

[Fang]

W3c complient:
top = document.defaultView.getComputedStyle(document.getElementById('MyDiv'), null).top
IE:
top = document.getElementById('MyDiv').currentStyle.top