/*

File: qtp_library.js

Version: <2.0>

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*/ 

if (typeof(QTP) == "undefined") { 
	/** QTP is a namespace for QuickTime Player javascript objects. */
	QTP = {}; 
}

/**
 * @fileoverview This file contains functions to generate a JavaScript-based QuickTime movie 
 * object, compatable with both Desktop and iPhone platforms. 
 *
 * @requires Prototype.Browser (Prototype.js or Mini_prototype.js)
 * @requires Event.observe (Prototype.js or Mini_prototype.js)
 */

/**
 * Version is a number representing the version of the QTP namespace and all its
 * contained classes.
 */
QTP.Version = 1.0;

/**
 * Function which, for Internet Explorer, manually enables the movie controller after
 * 100ms.  Needed to work around a IE bug in which the movie controller will never appear.
 */
function _FixIEController(element)
{
	if(navigator.appName != "Microsoft Internet Explorer")
		return;

	var movieObj = element.lastChild;

	if(!movieObj.GetControllerVisible());
		setTimeout( function() { movieObj.SetControllerVisible(true); }, 100);
}

/**
 * Returns the current document insertion point.  Useful for determining where in the DOM
 * to add DOM elements as children.
 * @return {DOMElement} The current document insertion point
 */
function QT_FindInsertionPoint() {
	var id = 'insertionPoint';
	var index = 0;
	while(document.getElementById(id) != null)
		id = 'insertionPoint' + (++index);
	
	document.write('<div id=' + id + '></div>');
	var div = document.getElementById(id);
	var ip = div.parentNode;
	ip.removeChild(div);
	return ip;
}

/**
 * Replaces a DOM element with a movie poster element.
 * @param {String} clickText the text appearing over the poster image (i.e. "Click to Play")
 * @param {String} posterSrc URL to the poster image
 * @param {DOMElement} element the DOM element which will be replaced by teh poster
 * @param {String} movieSrc URL to the movie
 * @param {Number} width width of the movie and poster image
 * @param {Number} height height of the movie and poster image
 * @param {pairs} remainder... pairs of arguments to pass to the movie when it is created.  
 * E.g.: "autoplay", "true", "scale", "aspect"
 */
function QT_ReplaceWithPoster()
{
	var args = Array.prototype.slice.call(arguments);
	var clickText = args.shift();
	var posterSrc = args.shift();
	var element = args.shift();
	var src = args[0];
	var width = args[1];
	var height = args[2];

	if (navigator.platform.indexOf('iPhone') > -1) 
	{
		QT_ReplaceElementContents(element, 
			posterSrc,
			width, height, '',
			'href', src,
			'target', 'myself',
			'controller', 'false', 
			'autoplay', 'true', 
			'scale', 'aspect');
	}
	else
	{
		element.style.position = 'relative';
		element.style.width = width + 'px';
		element.style.height = height + 'px';
		element.style.textAlign = 'center';
		element.style.backgroundImage = 'url(' + posterSrc + ')';
		element.style.backgroundRepeat = 'no-repeat';
		element.style.backgroundPosition = 'top center';
		element.args = args;

		var play = element.appendChild(document.createElement('span'));
		play.innerHTML = clickText;
		play.className = 'playButton';

		element.onclick = function() { 
			element.onclick = '';
			play.style.display = 'none';
			var playBackground = element.appendChild(document.createElement('div'));
			playBackground.className = 'playBackground';
			playBackground.style.opacity = '0';
			playBackground.style.width = element.style.width;
			playBackground.style.height = element.style.height;
	
			var intervalId = setInterval(function() {
			  var opacity = parseFloat(playBackground.style.opacity);
			  opacity = Math.min(1.0, opacity + 0.2);
			  playBackground.style.opacity = opacity;
			  playBackground.style.filter = 'alpha(opacity='+(opacity*100)+')';
			  }, 25);


			setTimeout(function() {
				clearInterval(intervalId); 
				element.style.backgroundImage = '';
				element.style.backgroundColor = 'rgb(0,0,0)';
				playBackground.style.opacity = '1.';
				playBackground.style.filter = 'alpha(opacity=100)';
	
				var txt = _QTGenerate("QT_WriteOBJECT_XHTML", true, args);
				if(txt.length > 0)
				  element.innerHTML = txt;
	
				_FixIEController(this);
			}, 250);
		}
	}
}

/**
 * Writes a new DOM element with a movie poster element to the document.
 * @param {String} clickText the text appearing over the poster image (i.e. "Click to Play")
 * @param {String} posterSrc URL to the poster image
 * @param {String} movieSrc URL to the movie
 * @param {Number} width width of the movie and poster image
 * @param {Number} height height of the movie and poster image
 * @param {pairs} remainder... pairs of arguments to pass to the movie when it is created.  
 * E.g.: "autoplay", "true", "scale", "aspect"
 */
function QT_WritePoster_XHTML()
{
	var args = Array.prototype.slice.call(arguments);
	var clickText = args.shift();
	var posterSrc = args.shift();
	var src = args[0];
	var width = args[1];
	var height = args[2];

	if (navigator.platform.indexOf('iPhone') > -1) 
	{
		QT_WriteOBJECT_XHTML( posterSrc,
			width, height, '',
			'href', src,
			'target', 'myself',
			'controller', 'false', 
			'autoplay', 'true', 
			'scale', 'aspect');
	}
	else
	{
		var id = 'qtp_poster_div_id_' + Math.random();
		document.writeln('<div id="'+id+'"></div>');
		var element = document.getElementById(id);
		element.id = '';
		element.style.position = 'relative';
		element.style.width = width + 'px';
		element.style.height = height + 'px';
		element.style.textAlign = 'center';
		element.style.backgroundImage = 'url(' + posterSrc + ')';
		element.style.backgroundRepeat = 'no-repeat';
		element.style.backgroundPosition = 'top center';

		var play = element.appendChild(document.createElement('span'));
		play.innerHTML = clickText;
		play.className = 'playButton';

		element.onclick = function() { 
			element.onclick = '';
			play.style.display = 'none';
			var playBackground = element.appendChild(document.createElement('div'));
			playBackground.className = 'playBackground';
			playBackground.style.opacity = '0';
			playBackground.style.width = element.style.width;
			playBackground.style.height = element.style.height;

			var intervalId = setInterval(function() {
			var opacity = parseFloat(playBackground.style.opacity);
			opacity = Math.min(1.0, opacity + 0.2);
			playBackground.style.opacity = opacity;
			playBackground.style.filter = 'alpha(opacity='+(opacity*100)+')';
			}, 25);


			setTimeout(function() {
				clearInterval(intervalId); 
				element.style.backgroundImage = '';
				element.style.backgroundColor = 'rgb(0,0,0)';
				playBackground.style.opacity = '1.';
				playBackground.style.filter = 'alpha(opacity=100)';

				var txt = _QTGenerate("QT_WriteOBJECT_XHTML", true, args);
				if(txt.length > 0)
				element.innerHTML = txt;

				_FixIEController(element);
			}, 250);
		}
	}
}