// HINTERGRUNDBILD AN FENSTERGRÖSSE ANPASSEN

window.addEvent("resize",setBackgroundImage);
window.addEvent("load",setBackgroundImage);


function setBackgroundImage()
{
     if(!$('backgroundContainer')) return;
   // mit random bg hintergrund und infotext laden
   var imgSrc = $('backgroundContainerIMG').getProperty('src');
   
   //var defWidth         = 2048;
   //var defHeight        = 1536;
   var defWidth         = 1500;
   var defHeight        = 1000;      
   var defRatio        = defWidth / defHeight;
   var hgbCt           = $('backgroundContainer');
   var img              = $('backgroundContainerIMG');
   hgbCt.style.width    = "0px";
   hgbCt.style.height    = "0px";
   var w                = window.getSize().x;
   var h                = window.getSize().y;
   hgbCt.style.width    = w + "px";
   hgbCt.style.height    = h + "px";
     var tmpRatio = w / h;
   if(tmpRatio > defRatio) {
       img.style.width        = w + "px";
       img.style.height    = w/defRatio + "px";
   } else {
       img.style.height    = h + "px";
       img.style.width        = h*defRatio + "px";
   }
     //img.style.visibility="visible";
   img.setOpacity(0);
   img.set({morph:{duration: 700}});
   img.morph({opacity: 1});
}