var allPage=13;   //总页数
var fixUrl="event_";   //文件前缀
//alert (document.cookie);

if (Get("event31Autoflip").toString()=="true")
{ 
document.getElementById("autoflip31").checked=true;
setTimeout('jumpUrl()', 10000); //10秒跳转
}

function jumpUrl(){
var jHref=location.href;

var i= parseInt(jHref.substring(jHref.indexOf(fixUrl)+fixUrl.length,jHref.lastIndexOf(".")));
var j=0;
if (i<allPage) {j=i+1}else{j=1;}

location.href=fixUrl+j.toString()+".html";
}

function Set(name){
var Then = new Date();
Then.setTime(Then.getTime() + 600*1000 ); //cookies保存600秒
var num = document.getElementById("autoflip31").checked; 
document.cookie = name+"="+num+";expires="+ Then.toGMTString();
if (num) {setTimeout('jumpUrl()', 2000);}
}

function Get(name){ 
var cookieString = new String(document.cookie);
var cookieHeader = name;
var beginPosition = cookieString.indexOf(cookieHeader);
var f_name=cookieString.indexOf(name)+1;
var l_name=cookieString.indexOf(';', f_name);
if(l_name == -1) l_name = cookieString.length;
if (beginPosition != -1){
//return (cookieString.substring(beginPosition + cookieHeader.length,cookieString.indexOf(";")));
return (cookieString.substring(f_name + cookieHeader.length, l_name));
}else{
return null;
}
}