var currMenuEl;

function menuImgSwap(el, evType) {
    if ((currMenuEl == el) && (evType == "mouseout")) {
        evType = "mouseover";
    }
    var oldImage = "mouseover";
    if (evType == "mouseover") {
        oldImage = "mouseout";
    }
    var newSrc = document.getElementById(el).src.replace(oldImage, evType);
    eval('document.getElementById(\'' + el + '\').src = newSrc');
}