function showLightForm()
{
    document.getElementById('lightForm').innerHTML = "<div id=\"light\" class=\"white_content\"></div>"+
    "<div id=\"fade\" class=\"black_overlay\"></div>";

    document.getElementById('light').style.display='block';
    document.getElementById('fade').style.display='block';
    
    var height = 95;
    
    var browserName=navigator.appName; 
    if (browserName=="Microsoft Internet Explorer")
    {
        height = 90;
    }

    document.getElementById('light').innerHTML =
        "<table width=\"100%\" style=\"height:"+height+"%;\">"+
        "    <tr><td style=\"height:100%;\">"+
        "        <iframe src=\"_ext/engine/form.php\" frameborder=\"0\" width=\"100%\" height=\"100%\"></iframe>"+
        "    </td></tr>"+
        "    <tr><td>"+
        "        <a href=\"javascript:void(0)\" onclick=\"hideLightForm()\">Zamknij</a>"+
        "    </td></tr>"+
        "</table>";
}

function hideLightForm()
{
    document.getElementById('light').style.display='none';
    document.getElementById('fade').style.display='none';
}

//
//<a href="javascript:void(0)" onclick="showLightForm()">here</a>
//<div id="light" class="white_content"></div>
//<div id="fade" class="black_overlay"></div>