JS获取页面上所有input

   for (var i = 0; i < document.getElementsByTagName("input").length; i++) {
             if (document.getElementsByTagName("input")[i].id.indexOf("tx_ID") > -1) {
                 document.getElementById("hid_SetValue").value += document.getElementsByTagName("input")[i].id + "," + document.getElementsByTagName("input")[i].value + "|";
             }
         }

获取所有Input

  function GetAllIframeItem() {
         document.getElementById("hid_LogInfo").value = "";
         var a = document.getElementById("Iframe3").contentWindow;
         var all = "";
         var mytds =a.document.getElementsByTagName("td");
         for (var i = 0; i < a.document.getElementsByTagName("td").length; i++) {
             document.getElementById("hid_LogInfo").value += a.document.getElementsByTagName("td")[i].innerText + ",";
         }
         alert(document.getElementById("hid_LogInfo").value);
         return false;
     }

获取iFrame的所有