js操作cookie

<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 "";    
}    
  
//删除cookie    
function delCookie(name)   
{   
   document.cookie = name+"=;expires="+(new Date(0)).toGMTString();   
}   
  
//获取指定名称的cookie的值       
function getCookie(objName)
{
   	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]);   
   }    
}   
  
//添加cookie
function addCookie(objName,objValue,objHours)   
{      
    var str = objName + "=" + escape(objValue);
    //为时不设定过期时间，浏览器关闭时cookie自动消失      
    if(objHours > 0){        
     	var date = new Date();   
        var ms = objHours*3600*1000;   
        date.setTime(date.getTime() + ms);   
        str += "; expires=" + date.toGMTString();   
   }   
   document.cookie = str;   
}   
  
//两个参数，一个是cookie的名子，一个是值     
function SetCookie(name,value)
{   
	//此 cookie 将被保存 30 天
    var Days = 30;  
    //new Date("December 31, 9998");     
   	var exp = new Date();    
    exp.setTime(exp.getTime() + Days*24*60*60*1000);   
    document.cookie = name + "="+ escape (value) + ";expires=" + exp.toGMTString();   
}   
  
//取cookies函数             
function getCookie(name)
{   
     var arr = document.cookie.match(new RegExp("(^| )"+name+"=([^;]*)(;|$)"));   
     if(arr != null){
     	return unescape(arr[2]);  
     } 
     	return null;   
}   
  
//删除cookie    
function delCookie(name) 
{   
    var exp = new Date();   
    exp.setTime(exp.getTime() - 1);   
    var cval=getCookie(name);   
    if(cval!=null) document.cookie= name + "="+cval+";expires="+exp.toGMTString();   
}   

</script> 

 

转自：http://www.oschina.net/code/snippet_156736_4923