How to open multiple windows on a button click?
<p>In my design there are <strong>three</strong>  <strong>buttons</strong>. I want to <strong>open new windows on each button click</strong>. I have done upto open a  new window. But when I <strong>click on the second button it opens in the same popup window</strong>. How can I avoid this and open <strong>three windows</strong> when click on these <strong>three buttons</strong>?        </p>

<blockquote>
  <p>c# code      </p>
</blockquote>

<pre><code>protected void btnApprove_Click(object sender, EventArgs e)
{
    string ddlVal = ddlComp.SelectedValue.ToString();
    if (ddlVal != "--Select The Competition--")
    {
        Session["ddlVal"] = ddlComp.SelectedValue.ToString();
        ScriptManager.RegisterStartupScript(this, typeof(string), "APPROVE_WINDOW", "var Mleft = (screen.width/2)-(760/2);var Mtop = (screen.height/2)-(700/2);window.open( 'approved.aspx', null, 'resizable=yes, status=yes,toolbar=no,scrollbars=yes,menubar=no,location=no,top=\'+Mtop+\', left=\'+Mleft+\'' );", true);
    }
    else
    {
        WebMsgBox.Show("Select a competition");
    }
}        
</code></pre>

<p>This is the code I have used for all the three buttons with different page names</p>