javascript js 添加 删除 cookie

<script language="JavaScript" type="text/javascript"><!--var Cookie=new Object();Cookie.setCookie=function(name,value,option){ //用于存储赋值给document.cookie的cookie格式字符串 var str=name+"="+escape(value);   if(option){  //如果设置了过期时间  if(option.expireDays){   var date=new Date();   var ms=option.expireDays*24*3600*1000;   date.setTime(date.getTime()+ms);   str+="; expires="+date.toGMTString();  }   if(option.path)str+="; path="+path;   //设置访问路径  if(option.domain)str+="; domain"+domain; //设置访问主机  if(option.secure)str+="; true";    //设置安全性 } document.cookie=str;}Cookie.getCookie=function(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 "";}Cookie.deleteCookie=function(name){ this.setCookie(name,"",{expireDays:-1}); //将过期时间设置为过去来删除一个cookie}Cookie.setCookie("user","jack");alert(Cookie.getCookie("user"));Cookie.deleteCookie("user");alert(Cookie.getCookie("user"));//--></script>

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