Tab和回车键互换的JS

   <script language="javascript">
 
function keyEnter(){
if(window.event.keyCode==13){
   window.event.keyCode=9;
 }
}

  </script>

例：<asp:TextBox ID="txt_SheetNO_S" runat="server" onkeydown="keyEnter()" ></asp:TextBox>