function logoreadcookie(name)
{
var start1 = mycookie.indexOf(name + "=");
if (start1== -1)
	{}
else
	{
	start=mycookie.indexOf("=",start1)+1; 
	var end = mycookie.indexOf(";",start);
	if (end==-1)
	{end=mycookie.length;}
	 var value=unescape(mycookie.substring(start,end));
	 if (value==null)
		 {
		 logo(0,true);
		 }
	 else
		 {
		 logo(value,true);
		 }
	}
}

var days=9999; 
var expire_date=new Date(); 
var ms_from_now=days*24*60*60*1000; 
expire_date.setTime(expire_date.getTime()+ms_from_now); 
var expire_string=expire_date.toGMTString();//转为GMT格式的String 
function logo(n,enable){
document.cookie="5vvlogo="+n+"; expires="+expire_string; 
var mycookie = document.cookie; 

  if (!document.getElementsByTagName) return;
   
    if(n==0){
		document.getElementById("top").style.display='block'
		document.getElementById("logo950").style.display='none'
			}
    if(n==1){
		document.getElementById("top").style.display='none'
		document.getElementById("logo950").style.display='block'
			}
}
var mycookie = document.cookie; 
logoreadcookie("5vvlogo");