var originclass;
	function inverttdmenu(){
		if (event.srcElement.tagName == "TD"){
			originclass = event.srcElement.parentElement.className;
			event.srcElement.parentElement.className = "onmouseover"; 
		}
	}
	//²Ëµ¥»Ö¸´
	function resumetdmenu(){
		if (event.srcElement.tagName == "TD")
			event.srcElement.parentElement.className = originclass; 
	}
	function buttonover(){
		event.srcElement.className = "TitleTDOver";
	}
	function buttonout(){
		event.srcElement.className = "TitleTD";
	}
	function buttonup(){
		event.srcElement.className = "TitleTDOver";
	}
	function buttondown(){
		event.srcElement.className = "TitleTDDown";
	}