function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}
function changeImagesArray(array) {
	if (preloadFlag == true) {
		var d = document; var img;
		for (var i=0; i<array.length; i+=2) {
			img = null; var n = array[i];
			if (d.images) {img = d.images[n];}
			if (!img && d.getElementById) {img = d.getElementById(n);}
			if (img) {img.src = array[i+1];}
		}
	}
}
function changeImages() {
	changeImagesArray(changeImages.arguments);
}


var preloadFlag = false;
function preloadImages(app_root) {
	if (document.images) {
		pre_lower_hp_open_ro = newImage( app_root & 'assets/images/lower_hp_open_ro.png');
		pre_lower_hp_politics_ro = newImage( app_root & 'assets/images/lower_hp_politics_ro.png');
		pre_lower_hp_horror_ro = newImage( app_root & 'assets/images/lower_hp_horror_ro.png');
		pre_lower_hp_comedy_ro = newImage( app_root & 'assets/images/lower_hp_comedy_ro.png');
		pre_lower_hp_urban_ro = newImage( app_root & 'assets/images/lower_hp_urban_ro.png');
		pre_lower_hp_mafia_ro = newImage( app_root & 'assets/images/lower_hp_mafia_ro.png');
		pre_lower_hp_urban_ro = newImage( app_root & 'assets/images/lower_hp_urban_ro.jpg');
		pre_lower_hp_horror_ro = newImage( app_root & 'assets/images/lower_hp_horror_ro.jpg');
		preloadFlag = true;
	}
}