get absolute position of element javascript code example

Example 1: javascript get element position relative to document

element.getBoundingClientRect().top + document.documentElement.scrollTop

Example 2: Get the position of a div/span tag

function getPos(el) {
    // yay readability
    for (var lx=0, ly=0;
         el != null;
         lx += el.offsetLeft, ly += el.offsetTop, el = el.offsetParent);
    return {x: lx,y: ly};
}