// JavaScript Document
function date(){
	var now=new Date();
    year=now.getYear();
    month=now.getMonth()+1;
    date=now.getDate();
    day=now.getDay();
switch(day)
{
case 0:day="星期日";break;
case 1:day="星期一";break;
case 2:day="星期二";break;
case 3:day="星期三";break;
case 4:day="星期四";break;
case 5:day="星期五";break;
case 6:day="星期六";break;
default:
day="";
}
document.write("今天是"+year+"年"+month+"月"+date+"日"+"&nbsp"+day);
	}

//选项卡
function card_a(num){
	var i=num;
	document.getElementById("ceng"+i).style.display="";
	document.getElementById("ta"+i).className="bg_card1";
		for(var j=1;j<4;j++)
		{
				if(j!=i)
				{
				document.getElementById("ceng"+j).style.display="none";
				document.getElementById("ta"+j).className="bg_card2";
				}
			}
}
function card_b(num){
	var i=num;
	document.getElementById("c"+i).style.display="";
	document.getElementById("tb"+i).className="bg_card1";
		for(var j=1;j<3;j++)
		{
				if(j!=i)
				{
				document.getElementById("c"+j).style.display="none";
				document.getElementById("tb"+j).className="bg_card2";
				}
			}
}
function card_c(num){
	var i=num;
	document.getElementById("cc"+i).style.display="";
	document.getElementById("t"+i).className="bg_c1";
		for(var j=1;j<5;j++)
		{
				if(j!=i)
				{
				document.getElementById("cc"+j).style.display="none";
				document.getElementById("t"+j).className="bg_c2";
				}
			}
}