function preloadImages(url,pictures){    
    if (document.images) {        
    	preload_image_object = new Image();
    	image_url = new Array();
    	image_url = pictures.split(",");
    	
    	var i = 0;
    	for(i=0; i<=image_url.length-1; i++){
    	    preload_image_object.src = url+image_url[i];
    	}
    }
}