//preload graphics

if (document.images){
	image1 = new Image();
	image1.src = "/graphics/nav_home_on.gif";
	image2 = new Image();
	image2.src = "/graphics/nav_products_on.gif";
	image3 = new Image();
	image3.src = "/graphics/nav_gallery_on.gif";
	image4 = new Image();
	image4.src = "/graphics/nav_catalog_on.gif";
	image5 = new Image();
	image5.src = "/graphics/nav_dealer_on.gif";
	image6 = new Image();
	image6.src = "/graphics/nav_store_on.gif";
}

function swap_image(img, flg){
	if (flg == 1) {
		eval("document.images['" + img + "'].src = '/graphics/nav_" + img + "_on.gif';");
	} else {
		eval("document.images['" + img + "'].src = '/graphics/nav_" + img + ".gif';");
	}
}

function validate_email(email) {
	if (/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(email)) {
		return true;
	} else {
		return false;
	}
}

function validate_signup(){

	if(/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(document.signup.email.value))
		return true;
	
	alert("Invalid email address! ");
	return false

}