var oPrevElement;
// click hover normal
function styleSwap(oElement, sEvent, sOff, sOn) {
	var cssClass
		if(sEvent == 'click') {
			if(oPrevElement != null) {
				oPrevElement.className = sOff;
			}
			if (oElement) { oElement.className = sOff; }
			oPrevElement = oElement; 
		}
		else {

			if (sEvent=='hover') cssClass = sOn;
			else cssClass = sOff;
			if (oPrevElement==null) {
				oElement.className = cssClass;
			}
			else {
				if(oPrevElement.id != oElement.id) {
					oElement.className = cssClass;
				}
			}
		}
}