FindePos

findpos.js

// Quelle: http://www.quirksmode.org/js/findpos.html
function findPos(obj){
    var curleft = 0, curtop = 0;
    if(obj.offsetParent){
        do {
            curleft += obj.offsetLeft;
            curtop  += obj.offsetTop;
        } while(obj = obj.offsetParent);
    }
    return [curleft, curtop];
}