HTML element positions using DOM

[Codfish]

Using the client side DOM I can get the position of an element using:

var myelement = document.getElementById("myid&quot
alert(myelement.style.top)

but if a style attribute such as style="top:100" for the HTML element has not been defined the style properties are empty in the DOM. Is there a way to get the coordinates of the element other than the style properties?