function olsImgSwap(id, newsrc) {
    if (!document.images) return;
    var i = document[id];
    i.olssrc = i.src;
    i.src = newsrc;
}
function olsImgPreLoad() {
    if (!document.images) return;
    var c, arg = olsImgPreLoad.arguments;
    for (c = 0; c < arg.length; c++) {
        var i = new Image();
        i.src = arg[c];
    }
}
function olsImgRestore(id) {
    if (!document.images) return;
    var i = document[id];
    i.src = i.olssrc;
}