// JavaScript Document
function show(layer_ref) {
	//hide surgical
	hza = document.getElementById("surgical");
	hza.style.display = "none";
	//hide medical
	hza = document.getElementById("medical");
	hza.style.display = "none";
	//hide physical
	hza = document.getElementById("physical");
	hza.style.display = "none";
	//hide emotional
	hza = document.getElementById("emotional");
	hza.style.display = "none";
	//hide breastcancer
	hza = document.getElementById("breastcancer");
	hza.style.display = "none";
	
	// show desired layer
	//hide surgical
	hza = document.getElementById(layer_ref);
	hza.style.display = "block";
} 

function showSTD(layer_ref) {
	//hide chlamydia
	hza = document.getElementById("chlamydia");
	hza.style.display = "none";
	//hide gonhorrea
	hza = document.getElementById("breastcancer");
	hza.style.display = "none";
	
	// show desired layer
	//hide surgical
	hza = document.getElementById(layer_ref);
	hza.style.display = "block";
} 
function validateContactUsForm() {
	var fname = document.getElementById("firstname");
	if (fname.value == "") {
		alert("Your first name is required.")
		return false;
	}
	var email = document.getElementById("email");
	if (email.value == "") {
		alert("Your email address is required.")
		return false;
	}
	var comments = document.getElementById("comments");
	if (email.value == "") {
		alert("Please enter a comment to send.")
		return false;
	}
	return true;
}