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() {
	if (document.images) {
		pre_n_1_over = newImage('images_4/n-1_over.jpg');
		pre_n_2_over = newImage('images_4/n-2_over.jpg');
		pre_n_3_over = newImage('images_4/n-3_over.jpg');
		pre_n_4_over = newImage('images_4/n-4_over.jpg');
		pre_n_5_over = newImage('images_4/n-5_over.jpg');
		pre_n_6_over = newImage('images_4/n-6_over.jpg');
		pre_n_7_over = newImage('images_4/n-7_over.jpg');
		pre_n_8_over = newImage('images_4/n-8_over.jpg');
		pre_c_1_base = newImage('images_1/c-1_base.png');
		pre_c_2_base = newImage('images_4/c-2_base.png');
		pre_c_3_base = newImage('images_4/c-3_base.png');
		pre_c_4_base = newImage('images_4/c-4_base.png');
		pre_c_5_base = newImage('images_4/c-5_base.png');
		pre_c_6_base = newImage('images_4/c-6_base.png');
		pre_c_7_base = newImage('images_4/c-7_base.png');
		pre_c_8_base = newImage('images_4/c-8_base.png');


		preloadFlag = true;
	}
}