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);          }