明月天山

var objDiv = document.getElementById("dockingPoint");
var docScrollLeft = document.body.scrollLeft;
var docSrollTop = document.body.scrollTop;
var e = objDiv;
var t = e.offsetTop;
var l = e.offsetLeft;
while(e = e.offsetParent){
????? t += e.offsetTop;
????? l += e.offsetLeft;
}
alert("Left: " + l + "nTop: " + t);