///设置cookie 
function setCookie(NameOfCookie, value, expiredays) 
{ 
var ExpireDate = new Date (); 
ExpireDate.setTime(ExpireDate.getTime() + (expiredays * 24 * 3600 * 1000)); 
document.cookie = NameOfCookie + "=" + escape(value) + 
  ((expiredays == null) ? "" : "; expires=" + ExpireDate.toGMTString()); 
} 
function getCookie(NameOfCookie) 
{ 
if (document.cookie.length > 0) 
{ 
begin = document.cookie.indexOf(NameOfCookie+"="); 
if (begin != -1)    
{ 
begin += NameOfCookie.length+1;//cookie值的初始位置 
end = document.cookie.indexOf(";", begin);//结束位置 
if (end == -1) end = document.cookie.length;//没有;则end为字符串结束位置 
return unescape(document.cookie.substring(begin, end)); } 
} 
return null; 
} 

function delCookie (NameOfCookie) 
{ 
if (getCookie(NameOfCookie)) { 
document.cookie = NameOfCookie + "=" + 
"; expires=Thu, 01-Jan-70 00:00:01 GMT"; 
} 
}
function delusr() 
{ 
delCookie("mpinfo"); 
location.reload(); 
} 
function getCookieValue(cookieName)
    {
    
      var cookies=document.cookie;//读取整个cookie文件中的内容
    var cookieIndex=cookies.indexOf(cookieName);//查找cookie文件名在字符串的开始位置
    
    if(cookieIndex!=-1)//如果在cookie文件中查找到cookie名，则进一步查找它的值
    {
   
     var cookieValueStart=cookieIndex+cookieName.length+1;//cookie值的开始位置，cookie名的开始位置加一（等于号占位1）
     var cookieValueEnd=cookies.indexOf(";",cookieValueStart);
     
     if(cookieValueEnd==-1)
     {
       cookieValueEnd=cookies.length;
     }
     var cookieValue=cookies.substring(cookieValueStart,cookieValueEnd);
     
    
    }
     return cookieValue;
     
   }

function useCookie() { 
  var mpinfo=getCookie("mpinfo"); 
  if(mpinfo==null){ 
    MpinfoOpen();
  }
}
//广告随机轮播
function adrandom(ad1,ad2) {
	var ad1 = document.getElementById(ad1);
	var ad2 = document.getElementById(ad2);
	var mplife_index=getCookieValue("mplife_index");

    var o = Math.ceil(Math.random()*10);
    if(mplife_index==null){
	  if(o>4){
		ad1.style.display="block";
		ad2.style.display="none";
		setCookie("mplife_index",1,1); 
	  }
	  else {
		ad1.style.display="none";
		ad2.style.display="block";
		setCookie("mplife_index",2,1); 
		}
	}
	else{
	  if(mplife_index==1){
			ad1.style.display="none";
		    ad2.style.display="block";
			setCookie("mplife_index",2,1);
			 //alert(mplife_index);
		  }else {
		  ad1.style.display="block";
		  ad2.style.display="none";
		  setCookie("mplife_index",1,1);
		  //alert(mplife_index);
	}
	}
}