var preloadFlag = false;

function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	for (var i=0; i<changeImages.arguments.length; i+=2) {
		document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
	}
}

function mOver(arg) {
	if (arg == "home") {
		changeImages('home_icon', 'images/nav_home_icon-over.gif');	
		changeImages('curr_icon', 'images/nav_home_icon.gif');
		changeImages('curr_text', 'images/nav_home_text-over.gif');
	} else if (arg == "products") {
		changeImages('products_icon', 'images/nav_products_icon-over.gif');	
		changeImages('curr_icon', 'images/nav_products_icon.gif');
		changeImages('curr_text', 'images/nav_products_text-over.gif');
	} else if (arg == "purchase") {
		changeImages('purchase_icon', 'images/nav_purchase_icon-over.gif');	
		changeImages('curr_icon', 'images/nav_purchase_icon.gif');
		changeImages('curr_text', 'images/nav_purchase_text-over.gif');
	} else if (arg == "support") {
		changeImages('support_icon', 'images/nav_support_icon-over.gif');	
		changeImages('curr_icon', 'images/nav_support_icon.gif');
		changeImages('curr_text', 'images/nav_support_text-over.gif');
	} else if (arg == "press") {
		changeImages('press_icon', 'images/nav_press_icon-over.gif');
		changeImages('curr_icon', 'images/nav_press_icon.gif');
		changeImages('curr_text', 'images/nav_press_text-over.gif');
	} else if (arg == "contact") {
		changeImages('contact_icon', 'images/nav_contact_icon-over.gif');
		changeImages('curr_icon', 'images/nav_contact_icon.gif');
		changeImages('curr_text', 'images/nav_contact_text-over.gif');
	}
}

function mOut(arg) {
	if (arg == "home") {
		changeImages('home_icon', 'images/nav_home_icon.gif');	
	} else if (arg == "products") {
		changeImages('products_icon', 'images/nav_products_icon.gif');	
	} else if (arg == "purchase") {
		changeImages('purchase_icon', 'images/nav_purchase_icon.gif');	
	} else if (arg == "support") {
		changeImages('support_icon', 'images/nav_support_icon.gif');	
	} else if (arg == "press") {
		changeImages('press_icon', 'images/nav_press_icon.gif');	
	} else if (arg == "contact") {
		changeImages('contact_icon', 'images/nav_contact_icon.gif');	
	}
	changeImages('curr_icon', nav_icon);
	changeImages('curr_text', nav_text);
}

function preloadImages() {
	if (document.images) {
		home_icon_over = newImage("images/nav_home_icon-over.gif");
		products_icon_over = newImage("images/nav_products_icon-over.gif");
		purchase_icon_over = newImage("images/nav_purchase_icon-over.gif");
		support_icon_over = newImage("images/nav_support_icon-over.gif");
		press_icon_over = newImage("images/nav_press_icon-over.gif");
		contact_icon_over = newImage("images/nav_contact_icon-over.gif");

		home_text_over = newImage("images/nav_home_text-over.gif");
		products_text_over = newImage("images/nav_products_text-over.gif");
		purchase_text_over = newImage("images/nav_purchase_text-over.gif");
		support_text_over = newImage("images/nav_support_text-over.gif");
		press_text_over = newImage("images/nav_press_text-over.gif");
		contact_text_over = newImage("images/nav_contact_text-over.gif");
		preloadFlag = true;
	}
}

function initNav() {
	changeImages('curr_icon', nav_icon);
	changeImages('curr_text', nav_text);
	preloadImages();
}

function openGallery(imgsrc) {
	picWin = window.open(imgsrc,'picWin','height=600,width=600,toolbar=no,scrollbars=no');
	picWin.focus();
}