//preload rollover images
if (document.images) {
	history_button = new Image(72,66); 
	history_button.src="images/nav_denville_history_over.jpg";
	method = new Image(102,66); 
	method.src="images/nav_denville_method_over.jpg";
	benefits = new Image(80,66); 
	benefits.src="images/nav_denville_benefits_over.jpg";
	getstarted = new Image(103,66); 
	getstarted.src="images/nav_denville_getstarted_over.jpg";
	dances = new Image(99,66); 
	dances.src="images/nav_denville_dances_over.jpg";
	faqs = new Image(62,66); 
	faqs.src="images/nav_denville_faqs_over.jpg";
	locations = new Image(86,66); 
	locations.src="images/nav_denville_locations_over.jpg";
	contact = new Image(88,66); 
	contact.src="images/nav_denville_contact_over.jpg";
	studios = new Image(120,66); 
	studios.src="images/nav_denville_studios_over.jpg";
	roxbury = new Image(208,38); 
	roxbury.src="images/nav_right_roxbury_over.jpg";
	kenilworth = new Image(208,83); 
	kenilworth.src="images/nav_right_kenilworth_over.jpg";
	denville = new Image(208,73); 
	denville.src="images/nav_right_denville_over.jpg";
	chatham = new Image(208,92); 
	chatham.src="images/nav_right_chatham_over.jpg";
	ridgewood = new Image(194,92); 
	ridgewood.src="images/nav_right_ridgewood_over.jpg";
	
}

//function to check for valid email address
function check_email(e){
	ok = "1234567890qwertyuiop[]asdfghjklzxcvbnm.@-_QWERTYUIOPASDFGHJKLZXCVBNM";
	
	for(i=0; i < e.length ;i++){
		if(ok.indexOf(e.charAt(i))<0){ 
			return false;
		}
	} 
	
	if (document.images) {
		re = /(@.*@)|(\.\.)|(^\.)|(^@)|(@$)|(\.$)|(@\.)/;
		re_two = /^.+\@(\[?)[a-zA-Z0-9\-\.]+\.([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$/;
		if (!e.match(re) && e.match(re_two)) {
			return (-1);
		} 
	}
	
}

//validation for newsletter subscribe form	
function check_subscribe(){
	if(document.forms['form_subscribe'].name.value == ''){
		alert("Please enter your name");
		return false;
	}
	if(document.forms['form_subscribe'].email.value == ''){
		alert("Please enter your email");
		return false;
	}
	
	var email_check = check_email(document.forms['form_subscribe'].elements['email'].value);

	if(!email_check){
		alert("The email you entered is not a valid email address");
		return false;
	}	
}