// Without Jquery

​

function offset(el) {

    var rect = el.getBoundingClientRect(),

    scrollLeft = window.pageXOffset || document.documentElement.scrollLeft,

    scrollTop = window.pageYOffset || document.documentElement.scrollTop;

    return { top: rect.top + scrollTop, left: rect.left + scrollLeft }

}

​

// example use

var div = document.querySelector('div');

var divOffset = offset(div);

console.log(divOffset.left, divOffset.top);