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_menu1_on = newImage('image/menu1-on.gif');
		pre_menu2_on = newImage('image/menu2-on.gif');
		pre_menu3_on = newImage('image/menu3-on.gif');
		pre_menu4_on = newImage('image/menu4-on.gif');
		pre_menu5_on = newImage('image/menu5-on.gif');
		pre_menu6_on = newImage('image/menu6-on.gif');
		pre_top_03_ = newImage('image/top_03-.gif');
		pre_right1_ = newImage('image/right1-.gif');
		pre_right2_ = newImage('image/right2-.gif');
		pre_right3_ = newImage('image/right3-.gif');
		pre_t1_ = newImage('image/t1-.gif');
		pre_t2_ = newImage('image/t2-.gif');
		pre_t3_ = newImage('image/t3-.gif');
		pre_t4_ = newImage('image/t4-.gif');
		pre_t5_ = newImage('image/t5-.gif');
		pre_t6_ = newImage('image/t6-.gif');
		pre_t7_ = newImage('image/t7-.gif');
		pre_t8_ = newImage('image/t8-.gif');
		pre_t9_ = newImage('image/t9-.gif');
		pre_center1_ = newImage('image/center1-.gif');
		pre_center2_ = newImage('image/center2-.gif');
		pre_center3_ = newImage('image/center3-.gif');
		pre_udbtn_service_f2 = newImage('../image/udbtn_service_f2.jpg');
		pre_mail5_ = newImage('../image/mail5-.gif');
		pre_mail1_ = newImage('image/mail1-.gif');
		pre_bottan_pdf_ = newImage('../image/bottan_pdf-.gif');
		pre_mail4_ = newImage('image/mail4-.gif');
		pre_mail5_ = newImage('image/mail4-.gif');
		preloadFlag = true;
	}
}