function showdate() {
	clientdate = new Date();
	clientyear = clientdate.getYear();
	if(clientyear < 300) clientyear = 1900 + clientyear ;
	clientmonth = clientdate.getMonth()+1;
	clientday = clientdate.getDate();
	weekday = clientdate.getDay();
	if (weekday==0) weekday="天";
	if (weekday==1) weekday="一";
	if (weekday==2) weekday="二";
	if (weekday==3) weekday="三";
	if (weekday==4) weekday="四";
	if (weekday==5) weekday="五";
	if (weekday==6) weekday="六";
	document.write("<span class='date'>"+clientyear+"年"+clientmonth+"月"+clientday+"日"+"　星期"+weekday+"</span>");
}