Open a .aspx page on a new tab in asp.net button click event using javascript

Code For .aspx page:

<asp:Button ID="btnAbout" runat="server" Text="About" onclick="btnAbout_Click" OnClientClick="return PostToNewWindow();"/>

Java Script Function:

<script type="text/javascript">

    function PostToNewWindow() {

        originalTarget = document.forms[0].target;

        document.forms[0].target = '_blank';

        window.setTimeout("document.forms[0].target=originalTarget;", 300);

        return true;

    }

</script>

Code in .cs Page For Button Click:

protected void btnAbout_Click(object sender, EventArgs e)

{

Response.Redirect("~/About.aspx");

}

That's It.