//preload rollover images
if (document.images) {
	about = new Image(82,24); 
	about.src="images/nav_about_over.jpg";
	testimonials = new Image(77,13); 
	testimonials.src="images/nav_testimonials_over.gif";
	services = new Image(72,24); 
	services.src="images/nav_services_over.jpg";
	conditions = new Image(144,15); 
	conditions.src="images/nav_conditions_over.gif";
	tests = new Image(144,15); 
	tests.src="images/nav_tests_over.gif";
	executive_health = new Image(144,15); 
	executive_health.src="images/nav_executive_health_over.gif";
	firstvisit = new Image(84,24); 
	firstvisit.src="images/nav_firstvisit_over.jpg";
	med_hist1 = new Image(127,15); 
	med_hist1.src="images/nav_med_hist1_over.gif";
	med_hist2 = new Image(127,15); 
	med_hist2.src="images/nav_med_hist2_over.gif";
	pers_test = new Image(127,15); 
	pers_test.src="images/nav_pers_test_over.gif";
	appt = new Image(127,15); 
	appt.src="images/nav_appointment_over.gif";
	media = new Image(99,24); 
	media.src="images/nav_media_over.jpg";
	web = new Image(99,15); 
	web.src="images/nav_media_web_over.gif";
	media_print = new Image(99,15); 
	media_print.src="images/nav_media_print_over.gif";
	air = new Image(99,15); 
	air.src="images/nav_media_air_over.gif";
	video = new Image(99,15); 
	video.src="images/nav_media_video_over.gif";
	casestudies = new Image(99,24); 
	casestudies.src="images/nav_casestudies_over.jpg";
	resources = new Image(84,24); 
	resources.src="images/nav_resources_over.jpg";
	total_health = new Image(125,13); 
	total_health.src="images/nav_total_health_over.gif";
	contact = new Image(64,24); 
	contact.src="images/nav_contact_over.jpg";
	home = new Image(42,15); 
	home.src="images/subnav_home_over.gif";
	appointment = new Image(132,15); 
	appointment.src="images/subnav_appointment_over.gif";
	diet = new Image(106,15); 
	diet.src="images/subnav_diet_over.gif";
	excerpts = new Image(101,30); 
	excerpts.src="images/nav_excerpts_over.gif";
	sample_menu = new Image(101,15); 
	sample_menu.src="images/nav_sample_menu_over.gif";
	
	brain_health = new Image(84,15); 
	brain_health.src="images/subnav_brain_health_over.gif";
	brainquiz = new Image(184,15); 
	brainquiz.src="images/nav_brainquiz_over.gif";
	ageprint_quiz = new Image(184,15); 
	ageprint_quiz.src="images/nav_ageprint_quiz_over.gif";
	ageprint_quiz_sup = new Image(184,15); 
	ageprint_quiz_sup.src="images/nav_ageprint_quiz_sup_over.gif";
	brainquiz_sup = new Image(184,15); 
	brainquiz_sup.src="images/nav_brainquiz_sup_over.gif";
	ces = new Image(184,15); 
	ces.src="images/nav_ces_over.gif";
	bio_hormones = new Image(184,15); 
	bio_hormones.src="images/nav_bio_hormones_over.gif";
	
	
	meet = new Image(150,15); 
	meet.src="images/subnav_meet_over.gif";
	ehp = new Image(136,15); 
	ehp.src="images/subnav_ehp_over.gif";
	brain_mind = new Image(157,15); 
	brain_mind.src="images/nav_brain_mind_over.gif";
	total_body = new Image(157,15); 
	total_body.src="images/nav_total_body_over.gif";
	integrative = new Image(157,15); 
	integrative.src="images/nav_integrative_over.gif";
	executive_suite = new Image(157,15); 
	executive_suite.src="images/nav_executive_suite_over.gif";
	education = new Image(66,15); 
	education.src="images/subnav_education_over.gif";
	
	
	faq = new Image(130,13); 
	faq.src="images/nav_faq_over.gif";
	total_health = new Image(130,13); 
	total_health.src="images/nav_total_health_over.gif";
	events = new Image(130,13); 
	events.src="images/nav_events_over.gif";
	blog = new Image(130,13); 
	blog.src="images/nav_blog_over.gif";
	newsletters = new Image(130,13); 
	newsletters.src="images/nav_newsletters_over.gif";
	booksedu = new Image(75,13); 
	booksedu.src="images/nav_books_edu_over.gif";
}


	
//function openwin() { window.open("","x" , 'toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=1,width=640,height=800,resizable=1'); }

//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(theForm){
	if (theForm.Lastname.value == ""){
		alert("Please enter your name");
		theForm.Lastname.focus();
		return (false);
	}
	if (theForm.Email.value == ""){
		alert("Please enter your email");
		theForm.Email.focus();
		return (false);
	}
	
	var email_check = check_email(theForm.Email.value);

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