function dom(id){return document.getElementById(id);}

/* 焦点图开始 */
var cur_index=1;
var num=4; //该值记录标签的个数
var settime;
function change_Menu(){
	for(var i=1;i<=num;i++){
		if(cur_index==i){
			dom("con"+i).style.display ="block";
			dom("m"+i).className = "on"+i;
		}else{
			dom("con"+i).style.display = "none";
			dom("m"+i).className ="out"+i;
		}
	}
}

function conAction(){
	if(cur_index<4){
	   cur_index++
	  }
	else{
	    cur_index=1
	  }
	change_Menu();
}

function startAction(){
	stopAction();
	settime=setInterval(conAction,10000)//设置延迟时间
}

function stopAction(){
	clearInterval(settime);
}

function clickAction(num){
	stopAction();
	cur_index = num;
	change_Menu();
}
window.onload=function(){
	startAction();
	}
/* 焦点图结束 */

function init(idS,getId){
	var liS=dom(idS).getElementsByTagName("li");
	var ulS=dom(idS).getElementsByTagName("ul");
	var j=ulS.length;
	var arr = new Array();
	if(j>0){
		for(var i=0;i<j;i++)
		{
			if(ulS[i].className=="list")
			{
				arr.push(ulS[i]);
			}
		}
	}
	for(var i=0; i<arr.length; i++){
		arr[i].setAttribute("id","cont_"+getId+i);
		liS[i].setAttribute("id",getId+i);
		liS[i].onmouseover=function (){			
			for(var i=0; i<arr.length; i++){
				dom("cont_"+getId+i).style.display="none";
				dom(getId+i).className="";
			}
			dom("cont_"+this.id).style.display="block";
			dom(this.id).className="ot";
		}
	}
}
init("demo","tab");	
init("demo1","tab1");