cookies封装

/**
 * @author wxf
 */
var cookie=new function(){
    this.set=function(name,value,hours){
        var life=new Date().getTime();
        life+=hours*1000*60*60;
        var cookieStr=name+"="+escape(value)+";expires="+new Date(life).toGMTString()+";path=/";
        document.cookie=cookieStr;
    };
    this.get=function(name){
        var cookies = document.cookie.split("; ");
                var i = 0;
                for(i=0; i<cookies.length; i++) {
                        var cookie2=cookies[i].split("=");
                        if(cookie2[0]==name) {return unescape(cookie2[1]);}
                }
        return '';
    };
    this.remove=function(name){
       var cookieStr=name+"="+escape('null')+";expires="+new Date().toGMTString();
        document.cookie=cookieStr;
    };
}