Get position of element by JavaScript

Question

I\'ve seen dozens of scripts that can catch the x and y position of an element/object within the page. But I am always having trouble with catching the x and y when the webp

Answer 1

I use following code to move div box to follow cursor in this Web IME site

function xy(x) {
    o = document.getElementById(x);
    var l =o.offsetLeft; var t = o.offsetTop;
    while (o=o.offsetParent)
        l += o.offsetLeft;
    o = document.getElementById(x);
    while (o=o.offsetParent)
        t += o.offsetTop;
    return [l,t];
}

Its return an array [left,top],