// news_flash.js

//globals
var timer, numberLinks, currentIndex, playLink, pauseLink, playButton, pauseButton;

function news_flash_pause(){
	clearInterval(timer);
	pauseButton.setAttribute('src', 'graphics/news_flash/pause-white.gif');
	playButton.setAttribute('src', 'graphics/news_flash/play-blue.gif');
	pauseLink.onmouseover = function(){pauseButton.setAttribute('src', 'graphics/news_flash/pause-white.gif')};
	pauseLink.onmouseout = function(){pauseButton.setAttribute('src', 'graphics/news_flash/pause-white.gif')};
	playLink.onmouseover = function(){playButton.setAttribute('src', 'graphics/news_flash/play-black.gif')};
	playLink.onmouseout = function(){playButton.setAttribute('src', 'graphics/news_flash/play-blue.gif')};
}

function news_flash_play(){
	clearInterval(timer);
	news_flash_rotate();
	news_flash_timer();
	playButton.setAttribute('src', 'graphics/news_flash/play-white.gif');
	pauseButton.setAttribute('src', 'graphics/news_flash/pause-blue.gif');
	playLink.onmouseover = function(){playButton.setAttribute('src', 'graphics/news_flash/play-white.gif')};
	playLink.onmouseout = function(){playButton.setAttribute('src', 'graphics/news_flash/play-white.gif')};
	pauseLink.onmouseover = function(){pauseButton.setAttribute('src', 'graphics/news_flash/pause-black.gif')};
	pauseLink.onmouseout = function(){pauseButton.setAttribute('src', 'graphics/news_flash/pause-blue.gif')};
}

function create_news_flash(){
	
	// add in the play and pause controls
	var news_flash_controls = document.getElementById('news_flash-controls');
	
	pauseLink = document.createElement('a');
	pauseButton = document.createElement('img');
	pauseLink.setAttribute('id', 'news_flash-pause');
	pauseLink.setAttribute('title', 'Pause');
	pauseLink.onclick = function(){news_flash_pause()};
	pauseLink.onmouseover = function(){pauseButton.setAttribute('src', 'graphics/news_flash/pause-black.gif')};
	pauseLink.onmouseout = function(){pauseButton.setAttribute('src', 'graphics/news_flash/pause-blue.gif')};
	pauseButton.setAttribute('src', 'graphics/news_flash/pause-blue.gif');
	pauseButton.setAttribute('width', '8');
	pauseButton.setAttribute('height', '8');
	
	playLink = document.createElement('a');
	playButton = document.createElement('img');
	playLink.setAttribute('id', 'news_flash-play');
	playLink.setAttribute('title', 'Play');
	playLink.onclick = function(){news_flash_play()};
	playButton.setAttribute('src', 'graphics/news_flash/play-white.gif');
	playButton.setAttribute('width', '8');
	playButton.setAttribute('height', '8');
	
	pauseLink.appendChild(pauseButton);
	playLink.appendChild(playButton);

	news_flash_controls.appendChild(pauseLink);
	news_flash_controls.appendChild(playLink);
	
	// add in numbers for each item in the news_flash-controls div
	var news_flash_numbers = document.getElementById('news_flash-numbers');
	for(var i=0; i<nf_headline.length; i++){
	  var itemLink = document.createElement('a');
	  itemLink.setAttribute('title', unescape(nf_headline[i]));
	  if(i == 0){
	  	itemLink.setAttribute('class', 'current');
	  	itemLink.setAttribute('className', 'current')
	  	itemLink.setAttribute('onclick', 'news_flash_rotate(-1); clearInterval(timer);');	  	
			itemLink.onclick = new Function("return ie_click_fix(\"-1\");");
	  }else{
			itemLink.setAttribute('onclick', 'news_flash_rotate(' + i + '); clearInterval(timer);');		
			itemLink.onclick = new Function("return ie_click_fix(\"" + i + "\");");
	  }	  
		var itemNumber = document.createTextNode(i+1);	 
	  itemLink.appendChild(itemNumber);
	  news_flash_numbers.appendChild(itemLink);
	}
	
	// preload the image files
	var preloader = new Image();
	for(var i=0; i<nf_file.length; i++){
		preloader.src = unescape(nf_file[i]);
	}
}

function ie_click_fix(toItem){	
	news_flash_rotate(toItem);
	news_flash_pause();	
	return null;
}

function news_flash_timer(){ 
	timer = setInterval("news_flash_rotate()", 5000);
}

function news_flash_rotate(toItem){
// find the current image index
	numberLinks = document.getElementById('news_flash-numbers').getElementsByTagName('a');
	var currentItem = 1;
	for(var i in numberLinks){
		if(/current/.test(numberLinks[i].className)){
			currentItem = numberLinks[i].firstChild.nodeValue;
		}
	}
	currentIndex = currentItem - 1;
	var newIndex;
	var totalItems = nf_headline.length;
	if(!toItem) {		
		if(currentItem == totalItems){
			newIndex = 0;
		}else{
			newIndex = currentIndex + 1;
		}	
	}else{
		newIndex = toItem;		
		if(toItem == -1){
			newIndex = 0;
		}
	}
		
// swap the image, alt & link
	var news_flash_img = document.getElementById('news_flash-img');
	news_flash_img.setAttribute('src', 'clientuploads/directory/NF/' + unescape(nf_file[newIndex]));
	news_flash_img.setAttribute('alt', unescape(nf_headline[newIndex]));
	news_flash_img.parentNode.setAttribute('href', unescape(nf_url[newIndex]));

// swap the headline & link
	var news_flash_headline = document.getElementById('news_flash-headline').getElementsByTagName('a')[0];
	var newHeadline = document.createTextNode(unescape(nf_headline[newIndex]));
	news_flash_headline.setAttribute('href', unescape(nf_url[newIndex]));
	news_flash_headline.replaceChild(newHeadline, news_flash_headline.firstChild);
	
// swap the subhead & link
	var news_flash_subhead = document.getElementById('news_flash-subhead');
	while(news_flash_subhead.hasChildNodes()){
		news_flash_subhead.removeChild(news_flash_subhead.firstChild);
	}
	if(unescape(nf_subhead[newIndex]) != ""){
		var newH2 = document.createElement('h2');
		var newA = document.createElement('a');
		var newSubhead = document.createTextNode(unescape(nf_subhead[newIndex]));
		newA.setAttribute('href', unescape(nf_url[newIndex]));
		newA.appendChild(newSubhead);
		newH2.appendChild(newA);
		news_flash_subhead.appendChild(newH2);
	}

// change the current number
	numberLinks[currentIndex].removeAttribute('class');	
	numberLinks[currentIndex].removeAttribute('className');
	numberLinks[newIndex].setAttribute('class', 'current');	
	numberLinks[newIndex].setAttribute('className', 'current')
}