三种回车变Tab功能

 1. 
<script language="vbscript">
<!--
Sub TextBox1_onkeydown
 if window.event.keyCode=13 then
  EnterTextBox_1.TextBox2.focus()
 end if
End Sub
Sub TextBox2_onkeydown
 if window.event.keyCode=13 then
  EnterTextBox_1.DropDownList1.focus()
 end if
End Sub
Sub DropDownList1_onkeydown
 if window.event.keyCode=13 then
  EnterTextBox_1.TextBox1.focus()
 end if
End Sub
//-->
</script>
 2.
<script language="vbscript">
<!--
Sub document_onkeydown
 if window.event.keyCode=13 then
  select case window.event.srcElement.name
   case "TextBox1"
    EnterTextBox_1.TextBox2.focus()
   case "TextBox2"
    EnterTextBox_1.DropDownList1.focus()
   case "DropDownList1"
    EnterTextBox_1.TextBox1.focus()
  end select
 end if
End Sub
//-->
  </script>
3.推荐
<script language="vbscript">
<!--
Sub document_onkeydown
 if window.event.keyCode=13 then
  window.event.keyCode=9
 end if
End Sub
//-->
  </script>