function movepic(img_name, img_src) {
    document[img_name].src = img_src;
}

function movepicByID(img_name, img_src) {
    document.getElementById(img_name).src = img_src;
}

function swapClass(objID, newClass)
{
    document.getElementById(objID).className = newClass;
}

function showhideObj(objID, display)
{
    document.getElementById(objID).style.display = display;
}