Javascript 遍历页面text控件详解

        function Texts()
        {
             //var els= document.getElementsByTagName("*");   //els得到页面所有控件
             var els= document.getElementsByTagName("INPUT"); //上面的也可，这样可以减少循环
             var msgs="";

             for (var i=0;i<els.length;i++ ) 
             {
                 if (els[i].type == "text" ) 
                 {
                     //取得控件ID
                     msgs += els[i].id + ",";
                 }
             }
             alert(msgs);
         }