if(document.images) {
    pics = new Array();
	pics[1] = new Image();
    pics[1].src = "images/bgimage.jpg";
    pics[2] = new Image();
    pics[2].src = "images/premier.jpg";
	pics[3] = new Image();
    pics[3].src = "images/store.jpg";
	pics[4] = new Image();
    pics[4].src = "images/premier+.jpg";
	pics[5] = new Image();
    pics[5].src = "images/premier++.jpg";
 }
 	function changer(from,to) {
  	if(document.images) {
    	document.images[from].src = pics[to].src;
    }
  }