C javascript reads and writes Cookie methods

1: write Cookies

Response.Cookies["UserName"].Value="Guest"; 
Response.Cookies["UserName"].Expires=DateTime.Now.AddDays(1); 

 HttpCookie userName_zhengshu_Cookie = new HttpCookie("uname"); 
        userName_zhengshu_Cookie.Value = " Chen xx"; 
        HttpCookie userLession_zhengshur_Cookie = new HttpCookie("lcode"); 
        userLession_zhengshur_Cookie.Value = "chen jian ping"; 
        userName_zhengshu_Cookie.Path = "/"; 
        userLession_zhengshur_Cookie.Path = "/"; 
// Limited period of validity  
        userLession_zhengshur_Cookie.Expires = DateTime.Now.AddDays(1); 
        userName_zhengshu_Cookie.Expires = DateTime.Now.AddDays(1); 
        Response.Cookies.Add(userLession_zhengshur_Cookie); 
        Response.Cookies.Add(userName_zhengshu_Cookie); 
//Cookies add  
 Response.AppendCookie(user_cookies); 
// The values  
Response.Write(Request.Cookies["uname"].Value); 

//javascript Write to read Cookie 
function Set_Cookie() 
{ 
    var setValue=" Chen xx"; 
    var exdate=new Date(); 
    exdate.setDate(exdate.getDate()+365); 
    document.cookie="userLession"+ "=" +setValue+";expires="+exdate.toGMTString()+";path=/"; 
    alert(" Has been written to Cookie"); 
} 
 function Get(){　      
   　　var cookieString=new String(document.cookie)      
   　　var cookieHeader = "userLession="      
   　　var beginPosition = cookieString.indexOf(cookieHeader)      
   　　if(beginPosition != -1) 
   　　{      
   　　　　alert(cookieString.substring(cookieHeader.length,cookieString.indexOf(";")));   
   　　}      
   }