// NAVBAR
function display_subnav(sub_div) {
	document.getElementById('about_links').style.display='none';
	document.getElementById('support_links').style.display='none';
	document.getElementById('services_links').style.display='none';
	document.getElementById('products_links').style.display='none';
	document.getElementById(sub_div).style.display='block';
}

function hide_subnav() {
	document.getElementById('about_links').style.display='none';
	document.getElementById('support_links').style.display='none';
	document.getElementById('services_links').style.display='none';
	document.getElementById('products_links').style.display='none';
}



function validate_email(frm) { 
	var value = frm.email.value;
	var email_regex = /.*@.*\..*/i;
	if (email_regex.test(value))
		return true;
	alert("Please enter a valid email address");
	return false;
}