call javascript from vb page inside panel

Que. I hv a javascript function in .aspx page and also panel.something like given below

//In .aspx page

script type

 <script type="text/javascript">     function ss(a,b,c){     window.open("default.aspx")     }     </script>

...

....

....

<asp:Panel ID="pan" runat="server"></asp:Panel>

//end .aspx page

//In vb page

pan.Controls.Add(New LiteralControl("<tr><td><img src='images/1.gif' width='14px' height='14px'></td></tr>"))

 pan.Controls.Add(New LiteralControl(" <a onclick='ss(1,'aaaa',1)' href=#>hello</a>"))

pan.Controls.Add(New LiteralControl("</table>"))//end vb page

when i pass only integer it works,but when i pass string value it stops working.....