var Imgi = new Array();
		
		function newImage(arg) {
			if (document.images) {
				rslt = new Image();
				rslt.src = arg;
				return rslt;
			}
		}
		
		function changeImages(img_name, img_file, pic) {	
			if (document.images && (preloadFlag == true)) {		
				img_name.src = "" + Imgi[pic][img_file].src;
			}
		}
		var preloadFlag = false;

		function preloadImages_mp() {			
				Imgi[0] = new Array();
				Imgi[0][0] = newImage("pics/btmain_page_off.jpg");
				Imgi[0][1] = newImage("pics/btmain_page_on.jpg");
				
				Imgi[1] = new Array();
				Imgi[1][0] = newImage("pics/bt_oferta_off.jpg");
				Imgi[1][1] = newImage("pics/bt_oferta_on.jpg");
				
				Imgi[2] = new Array();
				Imgi[2][0] = newImage("pics/bt_kontakt_off.jpg");
				Imgi[2][1] = newImage("pics/bt_kontakt_on.jpg");
				
				Imgi[3] = new Array();
				Imgi[3][0] = newImage("pics/bt_pomoc_off.jpg");
				Imgi[3][1] = newImage("pics/bt_pomoc_on.jpg");
	
				preloadFlag = true;
		}