cookie的添加、获取以及删除

var cookie={getCookie:function(name){var cookieArray=document.cookie.split("; ");for(var i=0; i<cookieArray.length; i++){var arr=cookieArray[i].split("=");if(arr[0]==name) return unescape(arr[1]);}return "";},delCookie:function(name){var date=new Date();date.setTime(date.getTime()-10000);//将时间设置为过去的一个时间即可删除其相关值var cval=this.getCookie(name);if(cval&&cval!=null)   document.cookie=name+"="+cval+";expires="+date.toGMTString();},addCookie:function(objName, objValue, objDay){var str=objName+'='+escape(objValue);if(objDay>0){var date=new Date();var ms=objDay*24*3600*1000;date.setTime(date.getTime()+ms);str+="; expires="+date.toGMTString();}document.cookie=str;}}