Do you mean the page re-loads??
As i suggested in your previous question you need ajax to do that.
having this code in masterpage might help
<body>
<asp:scriptmanager id="ScriptManager1" runat="server" xmlns:asp="#unknown">
</asp:scriptmanager>
<form id="form1" runat="server">
<div>
<asp:updatepanel id="UpdatePanel1" runat="server" updatemode="Conditional" xmlns:asp="#unknown">
<contenttemplate>
<asp:contentplaceholder id="ContentPlaceHolder1" runat="server">
</asp:contentplaceholder>
</contenttemplate>
</asp:updatepanel>
</div>
</form>
</body>