var adSpaces = Array(); var TIME_BASE_UNIT = 7000; //in ms

function Banner (name, type, src, height, width, link)
{ var elem = document.createElement("span");
    elem.className = "m_banner_hide";
    elem.id = name;
    elem.valign="top";
    elem.align="center";
    elem.bgcolor="white";

  if (link != "")
	  var str = '<a href="'+link+'" target="_blank" title="Διαφήμιση">';
	else
	  var str = "";
  if (type == "FLASH" )
  { str = str + '<OBJECT '
		str = str + 'classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" '
		str = str + 'codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,0,0" '
		str = str + 'WIDTH="'+width+'" '
		str = str + 'HEIGHT="'+height+'" '
		str = str + 'id="bnr_'+name+'" '
		str = str + 'ALIGN="" '
		str = str + 'VIEWASTEXT>'
		str = str + '<PARAM NAME=movie VALUE="'+ src + '">'
		str = str + '<PARAM NAME=quality VALUE=high>'
		str = str + '<PARAM NAME=bgcolor VALUE=#FFFCDA>'
		str = str + '<EMBED ';
		str = str + 'src="'+src+'" '
		str = str + 'quality=high '
//	str = str + 'bgcolor=#FFFCDA '
		str = str + 'WIDTH="'+width+'" '
		str = str + 'HEIGHT="'+height+'" '
		str = str + 'NAME="bnr_'+name+'" '
		str = str + 'ALIGN="center" '
		str = str + 'TYPE="application/x-shockwave-flash" '
		str = str + 'PLUGINSPAGE="http://www.macromedia.com/go/getflashplayer">'
		str = str + '</EMBED>'
		str = str + '</OBJECT>'
	}
	else if (type == "IMAGE" )
	{ str = str + '<img src="'+src+'" ';
		str = str + 'border="0" ';
		str = str + 'height="'+height+'" ';
		str = str + 'width="'+width+'">';
	}
	if (link != "")
	  str = str + '</a>';

	elem.innerHTML = str;
	
	return (elem);
}

function CreateSpace (name, width, height)
{ //initialization of space
  for (var i=0; i<adSpaces.length; i++)
  { if (adSpaces[i].name == name)
      break;
  }
  if (i == adSpaces.length) //create an entry for this name (= space) if not exists
  { adSpaces[i] = {};
    adSpaces[i].name = name;
    adSpaces[i].width = width;
    adSpaces[i].height = height;
    adSpaces[i].size_t = 0;
    
    adSpaces[i].adSpace = Array(); //div tags
    
    adSpaces[i].lob = Array(); //Length Of Banners (per adSpace)
    adSpaces[i].cbnr = Array(); //current banner (per adSpace)
  }

  //create html for space
  document.write ("<div id='_adSpace' style='overflow:hidden; text-align:center; width:100%; height:100%; text-align:center; border:1px solid grey;'></div>");  
  var elem = document.getElementById ("_adSpace");
    elem.id = name + adSpaces[i].size_t; //reset id
    
  //set the properties of new space
  adSpaces[i].lob[adSpaces[i].size_t] = 0;
  adSpaces[i].cbnr[adSpaces[i].size_t] = 0;
  
  //push new div element
  adSpaces[i].adSpace.push(elem);
  adSpaces[i].size_t++;
}

function RotateCreatives ()
{ for (var i=0; i<adSpaces.length; i++)
  { for (var j=0; j<adSpaces[i].adSpace.length; j++)
    { var p = (adSpaces[i].cbnr[j]+1) % adSpaces[i].lob[j];
      //hide current banner
      document.getElementById(adSpaces[i].adSpace[j].id + "_" + adSpaces[i].cbnr[j]).className = "m_banner_hide";
      //show next banner
      document.getElementById(adSpaces[i].adSpace[j].id + "_" + p).className = "m_banner_show";
      adSpaces[i].cbnr[j] = p;
    }
  }
}

function InitAdEngine(fileID)
{ var req = new Array();
  if (!fileID) //call for initialization (select a scenario file)
  { fileID = get_cookie("adEngine");
    if (fileID == "")
    { RemoteServiceCall (null,"http://www.kilkistoday.gr/adManager/loadScenario.php","POST",false,function(xmlhttp){
        InitAdEngine(xmlhttp.responseText);
      });
    }
    else
      InitAdEngine(fileID);
  }
  else //scenario is already selected - load creatives - start show
  { req.push ({field:"f",value:encodeURI("scenario_" + fileID)});
    RemoteServiceCall (req,"http://www.kilkistoday.gr/adManager/adManager.php","POST",false,function(xmlhttp){
      eval ("var adList = ("+xmlhttp.responseText+");"); //load JSON result

      //load creatives
      for (var i=0, grp_index = 0; i<adSpaces.length; i++)
      { var rand_start = Math.floor (Math.random()*(adList[adSpaces[i].name].length+1)); //random allocation of space for banners
        for (var k=rand_start, grp_index=0; k<adList[adSpaces[i].name].length+rand_start; k++)
        { var j= k % adList[adSpaces[i].name].length;
          var bn = Banner (adSpaces[i].adSpace[grp_index].id +  "_" + adSpaces[i].lob[grp_index],
                       adList[adSpaces[i].name][j][0], adList[adSpaces[i].name][j][1],
                       adSpaces[i].height, adSpaces[i].width, 
                       adList[adSpaces[i].name][j][2]);
          adSpaces[i].adSpace[grp_index].appendChild(bn);
          adSpaces[i].lob[grp_index]++;

          grp_index++; //load to next group
          if (grp_index == adSpaces[i].size_t) //check if last adSpace is filled. Restart group index
            grp_index = 0;
        }
      }
      //Show & Start iterative rotations
      RotateCreatives();
      setInterval (RotateCreatives, TIME_BASE_UNIT);
    });
  }
}