getting incorrect offsetleft and offsettop values in IE

[rohitchawla]

have a problem with this code when working in IE
it gives me 0,0 coords when i use iframe tag but gives correct coords when using firefox

function GetRealOffset(id)
{
 
    var elem = document.getElementById(id);
    var leftOffset = elem.offsetLeft;
    var topOffset = elem.offsetTop;
    var parent = elem.offsetParent;
 
        while(parent != document.body) 
    {
             leftOffset += parent.offsetLeft;
         topOffset += parent.offsetTop;
            parent = parent.offsetParent;
    }
        var Offsets = new Object();
    Offsets.top = topOffset;
    Offsets.left = leftOffset;
 
        alert(Offsets.top + " " +Offsets.left)
    return Offsets;
}

i found out some more function and they r all giving me 0,0 coords
i read in a tutorial that IE gives 0,0 coords for all elements unless the page is loaded but i want the offset values when the page is loading coz im putting advertisements in the iframes and some pages can take minutes to load.
All these functions r working fine in mozilla tho
i think what i need it a function to get the correct offset values when the page is loading in IE

[pbmods]

Heya, rohitchawla. Welcome to TSDN!

Check out this article.

[kovik]

Don't check against document.body, check against whether or not the offsetParent is null or not. The highest element has a null (non-existant) offsetParent.