function changeReferences()
{
	var arr= new Array("folderpic_ref_bag.jpg", "folderpic_ref_bibb.jpg", "folderpic_ref_connex.jpg", "folderpic_ref_femtec.jpg", "folderpic_ref_gtz.jpg", "folderpic_ref_spe.jpg", "folderpic_ref_wzb.jpg","folderpic_ref_virtacademy.jpg", "folderpic_ref_projects.jpg");
	var randomnumber=Math.floor(Math.random()*arr.length);
	document.getElementById("global").style.background = "url(/fileadmin/template/images/"+arr[randomnumber]+")";
	
}