asp.net js 方法传参

asp.net 前台页面有Js 方法用于模态对话框页面的打开.

  function OpenEdit(frmWin,width,height) 
  {       
   var me;  
   me = window; 
   var returnVal = window.showModalDialog(frmWin,me,'dialogWidth='+width +'px;dialogHeight='+height+'px;help:no;status:no;') 

  }

GridView 中有列点击时打开模态对话框.  SN,BU 通过绑定取值.传入js方法采用this.

                      <asp:TemplateField HeaderText="Edit">
                            <ItemTemplate>
                                  <asp:ImageButton ID = "ibnEdit" runat="server"  ImageUrl ="~/Images/edit.GIF" sn='<%# Eval("SN")%>' bu ='<%# Eval("BU")%>'  OnClientClick ="OpenEdit('BP_ModelSpec_Edit.aspx?SN=' + this.sn +'&BU=' + this.bu ,800,400);return false"/>
                            </ItemTemplate>
                      </asp:TemplateField>