protected void btClose_Click(object sender, EventArgs e)
   {
       Response.Write("<script> window.opener=self ; window.close(); </script>");
   }

               - OR - 

I am using 'Microsoft Visual Studio 2008' Professional Edition, and I use 'Firefox version 5.0'. ( Firefox browser informs me I am using the lsatest version, when I choose 'Help' - 'About Firefox') My Button ('btClose') is the ONLY object present on my Web Page. Code behind file reads : ============= ============ protected void btClose_Click(object sender, EventArgs e) { Response.Write("<script> window.opener=self ; window.close(); </script>"); } ============= ============ EVERYTHING works as planned - using either (*) Visual Studio's internal browser - OR - (*) Internet Explorer Click 'Close' button - it posts a confirm box, & success !! BUT - browsing via Firefox - nothing bad happens - NOTHING ! Its as if Firefox doesn't run scripts . Please let me know what to do. Sincerely Ray Grant ( RGrant41@aol.com)