protected void btnUpdateUc3_Click(object sender, EventArgs e)
{
Button btn = (Button)sender;
UC31.Title = "User control 3 udate no " + (++index3);
AjaxWebFormsController.ReturnUserControl(UC31);
}
protected void btnUpdateUc2_Click(object sender, EventArgs e)
{
UC21.Title = "User control 2 udate no " + (++index2);
AjaxWebFormsController.ReturnUserControl(UC21);
}