如何操作cookie

1. [代码][JavaScript]代码    

// cookie其实是一个key=value就是一个cookie而不是  

  
//获得coolie 的值   
function cookie(name){      
  
   var cookieArray=document.cookie.split("; "); //得到分割的cookie名值对      
  
   var cookie=new Object();      
  
   for (var i=0;i<cookieArray.length;i++){      
  
      var arr=cookieArray[i].split("=");       //将名和值分开      
  
      if(arr[0]==name)return unescape(arr[1]); //如果是指定的cookie，则返回它的值      
  
   }   
  
   return "";   
  
}   
  
   
  
function delCookie(name)//删除cookie  
  
{  
  
   document.cookie = name+"=;expires="+(new Date(0)).toGMTString();  
  
}  
  
   
  
function getCookie(objName){//获取指定名称的cookie的值  
  
    var arrStr = document.cookie.split("; ");  
  
    for(var i = 0;i < arrStr.length;i ++){  
  
        var temp = arrStr[i].split("=");  
  
        if(temp[0] == objName) return unescape(temp[1]);  
  
   }   
  
}  
  
   
  
function addCookie(objName,objValue,objHours){      //添加cookie  
  
    var str = objName + "=" + escape(objValue);  
  
    if(objHours > 0){                               //为时不设定过期时间，浏览器关闭时cookie自动消失  
  
        var date = new Date();  
  
        var ms = objHours*3600*1000;  
  
        date.setTime(date.getTime() + ms);  
  
        str += "; expires=" + date.toGMTString();  
  
   }  
  
   document.cookie = str;  
  
}  
  
   
  
function SetCookie(name,value)//两个参数，一个是cookie的名子，一个是值  
  
{  
  
    var Days = 30; //此 cookie 将被保存 30 天  
  
    var exp = new Date();    //new Date("December 31, 9998");  
  
    exp.setTime(exp.getTime() + Days*24*60*60*1000);  
  
    document.cookie = name + "="+ escape (value) + ";expires=" + exp.toGMTString();  
  
}  
  
function getCookie(name)//取cookies函数          
  
{  
  
    var arr = document.cookie.match(new RegExp("(^| )"+name+"=([^;]*)(;|$)"));  
  
     if(arr != null) return unescape(arr[2]); return null;  
  
   
  
}  
  
function delCookie(name)//删除cookie  
  
{  
  
    var exp = new Date();  
  
    exp.setTime(exp.getTime() - 1);  
  
    var cval=getCookie(name);  
  
    if(cval!=null) document.cookie= name + "="+cval+";expires="+exp.toGMTString();  
  
}