function tabit1(btn){
	for(i=0;i<5;i++){
		if(document.getElementById("div_"+i))
		{
			document.getElementById("div_"+i).className="kong_conwu";
			document.getElementById("top_"+i).className = "kong_wei";
		}
	};
		document.getElementById("div_"+btn).className="kong_con";
		document.getElementById("top_"+btn).className = "kong_xuan";
};
function tabit(btn){
	for(i=0;i<4;i++){
		if(document.getElementById("shi_"+i))
		{
			if (i==0)
			{
				document.getElementById("shi_"+i).className="sea_weixuan";
			}
			else
			{
				document.getElementById("shi_"+i).className="sea_weixuan_left";
			}
		}
	};
	if (btn==0)
	{
		document.getElementById("shi_"+btn).className="sea_xuan";
	}
	else
	{
		document.getElementById("shi_"+btn).className="sea_xuan_left";
	}
};
 function showdiv1(btn)
{
	var idname="div"+btn;
	var i;
	var idnum=btn
	//alert(idnum);
	for(i=1;i<5;i++)
	{
		document.getElementById("showdiv"+i).style.display="none";
	}
	document.getElementById("showdiv"+idnum).style.display="block";
}