I want to open pop up on button click event in asp.net c#

hiii,
i want to open pop up on button click event if user click on submit button pop up alert box open with message and two button Yes and No
if user click on yes button data submit and page redirect to other page if user click No then no redirect to other page and data not submit
my submit button click html code is below
<table width="100%" border="0" align="left" cellpadding="4" cellspacing="2">   <tr>     <td width="98%" align="right" bgcolor="#FFFFFF"><span style="margin-right:20px;"><asp:LinkButton ID="LinkButton5"  runat="server" CssClass="submit"  onclick="LinkButton1_Click" >Next >></asp:LinkButton> </span></td>   </tr> </table>
my pop up div code is below
<div id="popup2 ...