function showOption(strDiv)
{

   switch(strDiv)
   {
      case 'Normal':
         document.getElementById('download_multi').style.display = 'none';
         document.getElementById('download_normal').style.display = 'inline';
         break;

      case 'Multi':
         document.getElementById('download_multi').style.display = 'inline';
         document.getElementById('download_normal').style.display = 'none';
         break;

      default:
         document.getElementById('download_multi').style.display = 'none';
         document.getElementById('download_normal').style.display = 'inline';
         break;
   }
}

function show(name)
{
    var element = document.getElementById(name);
    if (element.style.display=="") 
    {
        element.style.display="none";
    } 
    else 
    {
        element.style.display="";
    }
}

function closeInfo() // obsługa advanced-box
{
    blenderOff();
    document.getElementById('advancedBox').style.display='none';
    document.getElementById('advancedBox').innerHTML = "";
}

function advancedBox(contain)
{
    var text = contain+'<tr><td>&nbsp;</td></tr><tr><td align=\"center\"><input type=\"button\" value=\"'+index_close+'\" onclick=\"closeInfo();\" style=\"width: 150px\"/></td></tr></table><br />&nbsp;';
    var elem = document.getElementById("advancedBox");
    elem.innerHTML = text;
    //elem.style.position = 'fixed';
    var links = (document.body.clientWidth - parseInt(elem.style.width)) / 2;
    if (links > 0) 
    {
        elem.style.left = links+"px";
    }
    else 
    {
        elem.style.left = "50px";
    }
    
    elem.style.top = "50px";     
    blenderOn();
    elem.style.display = "block";    
}

function blenderOn() // obsługa zaciemnienia strony
{
    elem = document.getElementById("blender");
    elem.style.width = "100%";
    elem.style.height = "100%";
    elem.style.display = "block";        
}
function blenderOff()
{
    document.getElementById("blender").style.display = "none";
}

function change_metchod() 
{
    if (document.getElementById('frm1').frm_metchod.checked)
    {
        document.getElementById('frm1').mode.value = 'instant_download';
        document.getElementById('frm1').frm_happy_hours.checked = false;
    }
    else
    {
        document.getElementById('frm1').mode.value = 'prepare_download';
    }
    return true;
}

function happy_hours()
{
    if (document.getElementById('frm1').frm_happy_hours.checked)
    {
        document.getElementById('frm1').frm_metchod.checked = false; 
        document.getElementById('frm1').mode.value = 'prepare_download';
    }
    return true;
}
function selectSrv(srv)
{
    document.getElementById('frm1').attributes['action'].value=srv;
    document.getElementById('frm2').attributes['action'].value=srv;
    
    closeInfo();
}

function advanced()
{
    var text = "";
    text += '<h2 style=\"text-align: center; width: 100%\">'+select_server+'</h2>';
    text += '<table width=\"100%\" cellspacing=\"1\" cellpadding=\"1\" border=\"0\">';
    for (var n = 0; n < servers_list.length; n++)
    {
        text += '<tr style=\"cursor:default;\">';
        text += '<td valign=\"middle\" align=\"center\"><input type=\"button\" value=\"'+servers_list[n]['server_name']+'\" onclick=\"selectSrv(\''+servers_list[n]['url']+'download/\');\" style=\"width: 150px\"/></tr>';
    }

    
    advancedBox(text);
}