var previousClass=null;

function menuMouseOver(obj) 
{
    previousClass = obj.className;
    obj.className = "headerMenuSubMenuHover";
}

function menuMouseOut(obj) {
    obj.className = previousClass;
}

function switchCartImage(ctrlID, onImageLink) {
    var ctrl = document.getElementById(ctrlID);
    ctrl.src = onImageLink;
  }