/* detect video mode, and browser, and provide these global variables for later use:
    IE6 : boolean, tells if the browser is IE6
	Wii : boolean, tells if the browser is Opera Wii 
	screenW, screenH : screen size, use this instead of screen.width and screen.height
	clientW, clientH : client size, use this instead of document.body.clientWidth and document.body.clientHeight
	stretch : boolean, tells if we have to use a fluid layout
	imgfolder : folder from which we'll download images 
 */
 

   var screenW = screen.width;
   var screenH = screen.height;
   
   var videoModes = new Array ( 
                      1920 , 1200,
                      1920 , 1080,
                      1680 , 1050,
                      1600 , 1200,
                      1440 ,  900,
                      1280 , 1024,
                      1280 ,  768,
					  1152 ,  864,
					  1024 ,  768,
					  800  ,  664,
					  800  ,  660,
					  800  ,  600
					  );
					  
  var imgfolder = "img/800x600/";
  for(var i = 0;i < videoModes.length;i += 2)
   if(screenW >= videoModes[i] && screenH >= videoModes[i + 1]){
    imgfolder = "img/" + videoModes[i] + "x" + videoModes[i + 1] + "/";
    break;
   }				
   
                           
      
       
 var ieIndex = navigator.userAgent.indexOf("MSIE");
 var appVersion;

 if(ieIndex >= 0){  
  var appVersion = navigator.userAgent.substr(ieIndex + 5);
  appVersion = parseInt(appVersion);
 }
 

 var IE6 = (ieIndex >= 0 && appVersion < 7) ? true : false; 
 var IE8 = (ieIndex >= 0 && appVersion == 8) ? true : false; 
 var Wii =  ( navigator.userAgent.indexOf("Nintendo Wii") >= 0 ) ? true : false;                 
            
 if(IE6)
  imgfolder = "img/IE6/" + imgfolder.substring(4);                  
                      
  var clientW = screenW;
  var clientH = screenH - 9 * 18;
  var stretch = ((!Wii && screenH < 600) || screenW > 1920 || screenH > 1280 || (screenW >= 1024 && screenH < 768) || screenH >= screenW || (screenW > 1152 && screenW < 1440 && screenH > 800 && screenH < 1024)) ? true : false;
  
  if(!Wii && window.innerHeight && window.innerHeight > screenH - 5 * 18){
    clientH = window.innerHeight;
	stretch = true;
   }               
                        
  if(stretch){
   imgfolder = IE6 ? "img/IE6/1920x1200/" : "img/1920x1200/";
  }

  if(Wii && screenH >= 620){ // 800x664
   screenH = 664;
   imgfolder = "img/800x664/";
  }
  else if(Wii){ // 800x472
   screenH = 472;
  }