解析prototype,JQuery中跳出each循环的方法

functionchk(){
       varflag=true;
       varmsg="";
       vartips={"username":"姓名","tel":"电话","company":"公司名称","loupan_name":"楼盘名","sdate":"团购时间","content_1":"团购内容"};
       $$(".required").each(function(el){
           if($F(el).blank()){
             msg+="请输入"+tips[$(el).readAttribute("id")]+"!\n\n";
             flag=false;
             throw$break;
           }
       }
      returnflag;

   }