javascript 关于cookie的操作

<script language=javascript>  
//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(); 
} 
</script>