function setBG (imgFolder) {
	$("body").css("backgroundImage", "url(content/projekte/"+imgFolder+"/background.jpg)"); 
}

function removeBG () {
	if (currentImage) {
		$("body").css("backgroundImage", "url("+currentImage+")"); 
	} 
	/*
	else {
		$("body").css("backgroundImage", "url('content/default.jpg')"); 
	}
	*/
}