function getPageCoords(element) {
    var coords = {x : 0, y : 0};
    while (element) {
        coords.x += element.offsetLeft;
        coords.y += element.offsetTop;
        element = element.offsetParent;
    }

    return coords;
}

function getOffsets(evt) {
    var target = evt.target;
    if (typeof target.offsetLeft == 'undefined') {
        target = target.parentNode;
    }
    var pageCoords = getPageCoords(target);
    var eventCoords = { 
        x: window.pageXOffset + evt.clientX,
        y: window.pageYOffset + evt.clientY
    };
    var offsets = {
        offsetX: eventCoords.x - pageCoords.x,
        offsetY: eventCoords.y - pageCoords.y
    }

    return offsets;
}