从js调用后台方法

看代码

'------------------------------------------------------------------------Front Groud:①Html:<asp:Button ID="hdBtnForSaveRtnValue" runat="server" Text="" Width ="0px"/>②JavaScript: objHdBtn=document.getElementById ("hdBtnForSaveRtnValue"); objHdBtn.click();'------------------------------------------------------------------------BackGround:Protected Sub hdBtnForSaveRtnValue_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles hdBtnForSaveRtnValue.Click MsgBox("callby javascript ") End Sub