function getContainerHeight(contID, tarID) {
    var divContainer = document.getElementById(contID);
    var divTarget = document.getElementById(tarID);
    var padBot = divTarget.style.paddingBottom.substring(0, divTarget.style.paddingBottom.length - 2);
    var padTop = divTarget.style.paddingTop.substring(0, divTarget.style.paddingTop.length - 2);
    divTarget.style.height = (divContainer.offsetHeight - padBot - padTop - 0) + "px";
}