window.onload = function () {
 fullScreen('#photo');
 fullScreen('#fader');
 $('#photo').fadeIn(500);
}

$(window).resize(function() {
 fullScreen('#photo');
 fullScreen('#fader');
});

function fullScreen(theItem){
 var winWidth=$(window).width();
 var winHeight=$(window).height();
 var imageWidth=$(theItem).width();
 var imageHeight=$(theItem).height();
 var picHeight = imageHeight / imageWidth;
 var picWidth = imageWidth / imageHeight;
 if ((winHeight / winWidth) < picHeight) {
 $(theItem).css("width",winWidth);
 $(theItem).css("height",picHeight*winWidth);
 } else {
 $(theItem).css("height",winHeight);
 $(theItem).css("width",picWidth*winHeight);
 };
 $(theItem).css("margin-left",winWidth / 2 - $(theItem).width() / 2);
 $(theItem).css("margin-top",winHeight / 2 - $(theItem).height() / 2);
}