function ToggleWaterMark(obj, whichevent, waterMarkText, waterMarkClass, normalClass) {
    if (obj) {
        if (whichevent == "blur" && obj.value == "") {
            obj.value = waterMarkText;
            obj.className = waterMarkClass;
        }
        if (whichevent == "focus" && obj.value == waterMarkText) {
            obj.value = "";
            obj.className = normalClass;
        }
    }
}