// JavaScript Document
var MaxImg = 4;
var NowImg = 1;
var bStart = 0;
var bStop =0;    //如果鼠标点击相应的数字，则bStop的值为1，否则图片进行自动切换，bStop的值为0；
var begin;
function initialization(){
	bStop =0;	
	var next = NowImg + 1;
	if(next == MaxImg+1){
		NowImg = MaxImg;
		next = 1;
	}	 
	if(bStop != 1){
		if(bStart == 0){
			bStart = 1;	
			begin = setTimeout('initialization()', 4000);	
			return;
		}
		else{			
			document.getElementById("pic" + next).style.display="";
			document.getElementById("pic" + NowImg).style.display="block";
			document.getElementById("desc" + next).style.display="";
			document.getElementById("desc" + NowImg).style.display="none";
			for (var i=1;i<5;i++){
 				document.getElementById("num"+i).className="link";
				if(i == next){
  				document.getElementById("num"+i).className="current";
				}
		    while(next==5){
				document.getElementById("num").className="link";
				}
			}			
			if(NowImg == MaxImg) 
				NowImg = 1;
			else
				NowImg++;		
		}		
		begin = setTimeout('initialization()', 4000);	
	}
}

function show(x){
	bStop=1;
	clearTimeout(begin);
	for (var i=1;i<5;i++){
		document.getElementById("pic" + i).style.display="block";
		document.getElementById("desc" + i).style.display="none";
		document.getElementById("num"+i).className="link";
		if(i == x){
			document.getElementById("pic" + i).style.display="block";
			document.getElementById("desc" + i).style.display="block";
			document.getElementById("num"+i).className="current";
		}		
	}	
}

function playit(){	
	begin = setTimeout('initialization()', 4000);	
}
begin = setTimeout('initialization()', 4000);