/* begin: Newsletter Signup Form Validation */
function isValidEmail(str) {
var filter = /^([a-zA-Z0-9_.-])+@(([a-zA-Z0-9-])+\.)+([a-zA-Z0-9]{2,4})$/;return (filter.test(str));}

function validateSignup(form) {
var error = "";var subCount = 0;for (var i=0;i < form.sub.length;i++) {
if (form.sub[i].checked) {
subCount += 1;}
}
if (subCount == 0) {
error += "Please select at least one newsletter.\n";}
if (!isValidEmail(form.email.value)){
error += "Please enter a valid email address.\n";}
if (error != "") {
alert(error + "\nThank You,\nHealth.com");return false;}
return true;}
/* end: Newsletter Signup Form Validation */


/***** TII Global Browser Sniffing Variables *****/
var tii_isopera = typeof window.opera != 'undefined';var tii_isie = typeof document.all != 'undefined' && !tii_isopera && navigator.vendor != 'KDE';var tii_issafari = navigator.vendor == 'Apple Computer, Inc.';

/***** ^^^ TII Global Functions Placed in >TII>Shared>JavaScript>TII LIB - JavaScript Event Listeners ^^^ *****/
/* Adds a function for the window load event */
function tii_callFunctionOnWindowLoad (functionToCall)
{
if (typeof window.addEventListener != 'undefined')
{
window.addEventListener ('load', functionToCall, false);}
else if (typeof document.addEventListener != 'undefined')
{
document.addEventListener ('load', functionToCall, false);}
else if (typeof window.attachEvent != 'undefined')
{
window.attachEvent ('onload', functionToCall);}
else
{
var oldFunctionToCall = window.onload;if (typeof window.onload != 'function')
{
window.onload = functionToCall;}
else
{
window.onload = function ()
{
oldFunctionToCall ();functionToCall ();};}
}
}

/* Calls functionToCall as soon as the targetElement is loaded, even if the document hasn't completely loaded yet. 
Place the parameter list for functionToCall in order after tii_callFunctionOnElementLoad (targetId, functionToCall),
e.g., tii_callFunctionOnElementLoad (targetId, functionToCall, parameter1, parameter 2, parameter 3, ...) */ 
function tii_callFunctionOnElementLoad (targetId, functionToCall)
{
var myArguments = arguments;tii_callFunctionOnWindowLoad (function ()
{
window.loaded = true;});var targetElement = document.getElementById (targetId);if (targetElement == null && !window.loaded)
{
var pollingInterval = setInterval (function ()
{
if (window.loaded)
{
clearInterval (pollingInterval);}
targetElement = document.getElementById (targetId);if (targetElement != null)
{
clearInterval (pollingInterval);var argumentsTemp = new Array ();var argumentsTempLength = myArguments.length - 2;for (var i = 0;i < argumentsTempLength;i++)
{
argumentsTemp [i] = myArguments [i + 2];} 
functionToCall.apply (this, argumentsTemp);}
}, 10);}
}

/* Attaches an event handling function to the targetElement. 
Examples of eventType values are 'mouseover' and 'keyup', as opposed to 'onmouseover' and 'onkeyup'. 
bubbleEventUpDOMTree is a boolean variable specifying whether the event should activate the event listeners
of all the ancestors of the element (up to the window object) */
function tii_addEventHandler (targetElement, eventType, functionToCall, bubbleEventUpDOMTree)
{
if (!targetElement)
{
window.status = 'Warning: Tried to attach event to null object';return false;}
if (typeof targetElement.addEventListener != 'undefined')
{
targetElement.addEventListener (eventType, functionToCall, bubbleEventUpDOMTree);}
else if (typeof targetElement.attachEvent != 'undefined')
{
targetElement.attachEvent ('on' + eventType, functionToCall);}
else
{
eventType = 'on' + eventType;if (typeof targetElement [eventType] == 'function')
{
var oldListener = targetElement [eventType];targetElement [eventType] = function ()
{
oldListener ();return functionToCall ();}
}
else
{
targetElement [eventType] = functionToCall;}
}

return true;}

/* Begin Main story module */
var currPic=0;var timer1, timer2;var paused = true;var opacity = 100;var msDivs = new Array(5);var msButtons = new Array(5);var msWrap;var button;var position;var currPosition;
function initPageComponents() {
/* Used to load all components on the page */
msDivs[0] = document.getElementById('mainStory1');msDivs[1] = document.getElementById('mainStory2');msDivs[2] = document.getElementById('mainStory3');msDivs[3] = document.getElementById('mainStory4');msDivs[4] = document.getElementById('mainStory5');msButtons[0] = document.getElementById('a1');msButtons[1] = document.getElementById('a2');msButtons[2] = document.getElementById('a3');msButtons[3] = document.getElementById('a4');msButtons[4] = document.getElementById('a5');msWrap = document.getElementById('mainStoryWrap');if (msWrap != null && msDivs[0] != null && msButtons[0] != null) {
initPausePlayEvents();var breakingNews = document.getElementById('breakingNewsImg');if (breakingNews == null) {
paused = false;timer1 = setTimeout('timedStory()', 7000);}
doImageSwap();}
}

function initPausePlayEvents() {
/* add Event Handlers for the Photo Module */
if (!document.getElementById || !document.getElementsByTagName) {
return true;}
/* checks for Javascript operability */ 

/* get all the links in the photo module */
var topStories = document.getElementById('topStories');if (topStories != null) {
var links = topStories.getElementsByTagName('a');
for (i = 0;i < links.length;i++) {
if (links.item(i).id.substring(0, 1) == 'a') {
links.item(i).href = 'javascript:{}';tii_addEventHandler(links[i], 'click', function(event){
doNumber(event);}, false);}
}

var playLink = document.getElementById('playLink');
tii_addEventHandler(playLink, 'click', function(event){
doButton(event);}, false);}
}

/* helper function to deal specifically with images and the cross-browser differences in opacity handling */
function fader(opac) {
if (msWrap != null) {
if (msWrap.style.MozOpacity != null) {
/* Mozilla's pre-CSS3 proprietary rule */
msWrap.style.MozOpacity = (opac / 100) - .001;}
else 
if (msWrap.style.opac != null) {
/* CSS3 compatible */
msWrap.style.opacity = (opac / 100) - .001;}
else 
if (msWrap.style.filter != null) {
/* IE's proprietary filter */
if (opac == 100) {
msWrap.style.filter = "none;";}
else {
msWrap.style.filter = "alpha(opacity=" + opac + ");";}
}
}
}

function change(num, step) {
/*fadeOut*/
if (step == 1) {
opacity -= 10;if (opacity > 0) {
fader(opacity);timer2=setTimeout('change(' + num + ', 1)',50);}
else { 
change(num, 2);}
}

/*change picture*/
else if (step == 2) {
currPic = num;msDivs[0].style.display = (num == 0 ? "block" : "none");msDivs[1].style.display = (num == 1 ? "block" : "none");msDivs[2].style.display = (num == 2 ? "block" : "none");msDivs[3].style.display = (num == 3 ? "block" : "none");msDivs[4].style.display = (num == 4 ? "block" : "none");msButtons[0].className = (num == 0 ? "on" : "off");msButtons[1].className = (num == 1 ? "on" : "off");msButtons[2].className = (num == 2 ? "on" : "off");msButtons[3].className = (num == 3 ? "on" : "off");msButtons[4].className = (num == 4 ? "on" : "off");change(num, 3);}
/*fadeIn*/
else if (step == 3) { 
opacity += 10;if (opacity <= 100) {
fader(opacity);timer2=setTimeout('change(' + num + ', 3)',50);}
}
}

/* change picture, wait 5 seconds, repeat */
function timedStory() {
if (currPic<4){
currPic++;change(currPic, 1);timer1=setTimeout('timedStory()',7000);}else{
currPic=0;clearTimeout(timer1);change(currPic,1);paused = true;doImageSwap();}
}

/* executed when the play pause button is selected */
function doButton(event) {
paused = !paused;doImageSwap();if (paused) {
/* stop the image loop */
clearTimeout(timer1);}
else { 
/* restart the image loop */
timedStory();}
} 

/*executed when a number link is selected */
function doNumber (event) {
var eventSource = typeof event.target != 'undefined' ? event.target : window.event.srcElement;/* get the number portion of the class name of the event source */ 
currPic = eventSource.id.substring(1,2) - 1;paused = true;doImageSwap();clearTimeout(timer1);clearTimeout(timer2);change(currPic, 1);
} 

/* swap the play pause button image */
function doImageSwap() {
var button = document.getElementById('playLink');if (button != null) {
if (!tii_isie) {
var imageFile = paused ? "http://img2.timeinc.net/health/static/i/home_pg_ctrl_btn_play2.png" : "http://img2.timeinc.net/health/static/i/home_pg_ctrl_btn_pause2.png";button.style.background = "url(" + imageFile + ") 0px 0px no-repeat";}
else {
/* Use an image sprite to deplete the image flickering in IE */
button.style.backgroundImage = "url(http://img2.timeinc.net/health/static/i/home_pg_ctrl_btn_playpause2.png)";position = paused ? "24px" : "0px";/* change the image source */
try {
document.execCommand('BackgroundImageCache', false, true);} 
catch (e) {
}

/* if paused and play is not displayed */
if (paused == true && currPosition != "24px") {
button.style.backgroundPositionY = position;}
/* if playing and paused is not displayed */
if (paused != true && currPosition != "0px") {
button.style.backgroundPositionY = position;}
currPosition = position;}
}
} 
/* End Main story module */

/********************* Begin slideshow module *********************/
var currPic = 0;var paused = false;var ssTxt = new Array(5);var ssPh = new Array(5);var ppBtn, ppBtnPrev, ppBtnNext;var timer1;var delay = 6000;//in ms


tii_callFunctionOnWindowLoad (function () {
initPageComponents();});/********************* End slideshow module *********************/

/* BEGIN: Carb Lover Newsletter Subscription */
(function($){
$(document).ready(function() {
$('.nl-error').hide();$('#nl-email').focus(function() {
if (($('#nl-email').val()) == "Enter email address") { $('#nl-email').val('');};});$('#nl-email').blur(function() {
if (($('#nl-email').val()) == "") { $('#nl-email').val('Enter email address');};});
$('#nl-subscribe').submit(function() { 
var nlEmail = $('#nl-email').val();if (isValidEmail(nlEmail)) {
$('.nl-error').hide();return true;} else {
$('.nl-error').show();$('#nl-email').focus();return false;} 
});return true;});})(jQuery);/* END: Carb Lover Newsletter Subscription */