var aryImages = new Array(4);

aryImages[0] = "images/index_menu_1_on.png";
aryImages[1] = "images/index_menu_2_on.png";
aryImages[2] = "images/index_menu_3_on.png";
aryImages[3] = "images/index_menu_4_on.png";

for (i=0; i < aryImages.length; i++) {
	var preload = new Image();
	preload.src = aryImages[i];
}
				

var index_menu_1_off = 'images/index_menu_1_off.png';
var index_menu_1_on = 'images/index_menu_1_on.png';
var index_menu_2_off = 'images/index_menu_2_off.png';
var index_menu_2_on = 'images/index_menu_2_on.png';
var index_menu_3_off = 'images/index_menu_3_off.png';
var index_menu_3_on = 'images/index_menu_3_on.png';
var index_menu_4_off = 'images/index_menu_4_off.png';
var index_menu_4_on = 'images/index_menu_4_on.png';