protected void fbsubmit_click(object sender, EventArgs e)
{
li.fb_uname = fbUname.Text;
li.fb_mail = fbmail.Text;
li.fb_review = fbreview.Text;
li.fb_help = fbhelp.Text;
li.ins_feedback(li);
fbmail.Text = null;
fbreview.Text = null;
fbhelp.Text = null;
}