/* = FLASH VIDEO
-------------------------------------------------
	Creates embed code for Flash player
-------------------------------------------------*/

var isIE  = (navigator.appVersion.indexOf("MSIE") != -1) ? true : false;
var isWin = (navigator.appVersion.toLowerCase().indexOf("win") != -1) ? true : false;
var isOpera = (navigator.userAgent.indexOf("Opera") != -1) ? true : false;
jsVersion = 1.1;
function JSGetSwfVer(i){
	if (navigator.plugins != null && navigator.plugins.length > 0) {
		if (navigator.plugins["Shockwave Flash 2.0"] || navigator.plugins["Shockwave Flash"]) {
			var swVer2 = navigator.plugins["Shockwave Flash 2.0"] ? " 2.0" : "";
      		var flashDescription = navigator.plugins["Shockwave Flash" + swVer2].description;
			descArray = flashDescription.split(" ");
			tempArrayMajor = descArray[2].split(".");
			versionMajor = tempArrayMajor[0];
			versionMinor = tempArrayMajor[1];
			if ( descArray[3] != "" ) {
				tempArrayMinor = descArray[3].split("r");
			} else {
				tempArrayMinor = descArray[4].split("r");
			}
      		versionRevision = tempArrayMinor[1] > 0 ? tempArrayMinor[1] : 0;
            flashVer = versionMajor + "." + versionMinor + "." + versionRevision;
      	} else {
			flashVer = -1;
		}
	}

	else if (navigator.userAgent.toLowerCase().indexOf("webtv/2.6") != -1) flashVer = 4;

	else if (navigator.userAgent.toLowerCase().indexOf("webtv/2.5") != -1) flashVer = 3;

	else if (navigator.userAgent.toLowerCase().indexOf("webtv") != -1) flashVer = 2;

	else {
		
		flashVer = -1;
	}
	return flashVer;
} 

function DetectFlashVer(reqMajorVer, reqMinorVer, reqRevision) 
{
 	reqVer = parseFloat(reqMajorVer + "." + reqRevision);

	for (i=25;i>0;i--) {	
		if (isIE && isWin && !isOpera) {
			versionStr = VBGetSwfVer(i);
		} else {
			versionStr = JSGetSwfVer(i);		
		}
		if (versionStr == -1 ) { 
			return false;
		} else if (versionStr != 0) {
			if(isIE && isWin && !isOpera) {
				tempArray         = versionStr.split(" ");
				tempString        = tempArray[1];
				versionArray      = tempString .split(",");				
			} else {
				versionArray      = versionStr.split(".");
			}
			versionMajor      = versionArray[0];
			versionMinor      = versionArray[1];
			versionRevision   = versionArray[2];
			
			versionString     = versionMajor + "." + versionRevision;   
			versionNum        = parseFloat(versionString);
        	
			if ( (versionMajor > reqMajorVer) && (versionNum >= reqVer) ) {
				return true;
			} else {
				return ((versionNum >= reqVer && versionMinor >= reqMinorVer) ? true : false );	
			}
		}
	}	
	return (reqVer ? false : 0.0);
}

/* = CLEAR FIELD
-------------------------------------------------
	clears the value of any inpu field with the
	class name of clearDefault
-------------------------------------------------*/

function clickClear() {
	if(!document.getElementsByTagName) return false;
	
	var inputs = document.getElementsByTagName("INPUT");
	
	for ( var i = 0; i < inputs.length; i++)
	{
		if(inputs[i].className.indexOf("clearDefault") != -1)
		{
			inputs[i].onclick = function() {
				if(this.value == this.defaultValue)
				{
					this.value = "";
				}
				return 0;
			}
			inputs[i].onfocus = function() {
				if(this.value == this.defaultValue)
				{
					this.value = "";
				}
				return 0;
			}
			inputs[i].onblur = function() {
				if(this.value == "")
				{
					this.value = this.defaultValue;
				}
				return 0;
			}
		}
	}
	return 0;
}

/* = FEATURE NEWS AREA
-------------------------------------------------*/

function prepFeaturedNews() {
	if(!document.getElementById || !document.getElementsByTagName) return 0;
	if(!document.getElementById("featured-news-block") 
		|| !document.getElementById("featured-news-list") 
		|| !document.getElementById("featured-news-image")) return 0;
	
	var list = document.getElementById("featured-news-list");
	var imageBlockContainer = document.getElementById("featured-news-image");
	
	var listItem = list.getElementsByTagName("LI");
	
	for( var i = 0; i < listItem.length; i < i++ )
	{
		var link = listItem[i].getElementsByTagName("A")[0];
		if(!link) continue;
		
		listItem[i].onmouseover = function() {
			var link = this.getElementsByTagName("A")[0];
			var href = link.getAttribute("href");
			
			var imageId = href.split("#")[1];

			if(!document.getElementById(imageId)) return 0;
			var imageBlock = document.getElementById(imageId);
			hideAll(imageBlockContainer, "DIV", "photo", "hide");
			for(var j = 0; j < listItem.length; j++)
			{
				listItem[j].className = listItem[j].className.replace(/ ?active ?/g, "");
			}
			imageBlock.className = imageBlock.className.replace(/ ?hide ?/g, "");
			var activateListItem = this;
			if(activateListItem.className) {
				activateListItem.className += " active";
			}
			else {
				activateListItem.className = "active";
			}
			
			return false;
		}
	}
}

/* = HIDE ELEMENTS IN A CONTAINER OF A CERTAIN TYPE, CLASS AND HIDE THEM WITH SPECIFIED CLASS */

function hideAll(container, elementType, elementClass, hideClass) {
	if(!container || !elementType || !elementClass || !hideClass) return 0;
	
	var element = container.getElementsByTagName(elementType);
	
	for(var i = 0; i < element.length; i++)
	{
		if(!element[i].className.match(elementClass)) continue;
		if(element[i].className.match(hideClass)) continue;
		
		if(element[i].className) {

			element[i].className += " hide";
		}
		else {
			element[i].className = "hide";
		}
	}
	return 0;
}

/* = PREP INPUT TYPES
-------------------------------------------------*/

function prepInputs() {

	var inputs = document.getElementsByTagName("INPUT");
	for(var i = 0; i < inputs.length; i++)
	{
		if(inputs[i].getAttribute("type") == "checkbox")
		{
			if(inputs[i].className)
			{
				inputs[i].className += " checkBoxInput";
			}
			else {
				inputs[i].className = "checkBoxInput";
			}
			
		}
		else if(inputs[i].getAttribute("type") == "radio")
		{
			if(inputs[i].className)
			{
				inputs[i].className += " radioInput";
			}
			else {
				inputs[i].className = "radioInput";
			}
		}
		else if (inputs[i].getAttribute("type") == "image")


		{
			if(inputs[i].className)
			{
				inputs[i].className += " submitButton";
			}
			else {
				inputs[i].className = "submitButton";
			}
		}
	}
}

function prepFormReset() {
	var forms = document.getElementsByTagName("FORM");
	for(var i = 0; i < forms.length; i++)
	{
		var links = forms[i].getElementsByTagName("A");
		for(var j = 0; j < links.length; j++)
		{
			
			if(links[j].className.match("reset-link"))
			{
				links[j].parentForm = forms[i];
				links[j].onclick = function() {
					this.parentForm.reset();
					
					return false;
				}
			}
		}
	}
	return 0;
}

/* = PRINT LINKS
-------------------------------------------------
	This function adds the javascript print
	function to the onclick event.  The href of 
	this links should be to a printer friendly page
	if possible
-------------------------------------------------*/

function prepPrintLinks() {
	var link = document.getElementsByTagName("A");
	for(var i = 0; i < link.length; i++)
	{
		if(!link[i].className.match("print-link")) continue;
		
		link[i].onclick = function() {
			print();
			return false;
		}
	}
	return 0;
}

/* = EMAIL A FRIEND LINK
-------------------------------------------------*/

function prepEmailFriend() {
	if(!document.getElementById("action-email") || !document.getElementById("emailFriendForm")) return true;
	if(!document.getElementById("emailHref")) return true;
	var emailLink = document.getElementById("action-email").getElementsByTagName("A")[0];
	var emailForm = document.getElementById("emailFriendForm");
	var hrefArea = document.getElementById("emailHref");

	emailLink.onclick = function() {
		showElement(emailForm);
		return false;
	}
	
	var href = location.href;
	var hrefText = document.createTextNode(href);
	hrefArea.appendChild(hrefText);
	
	var closeLink = emailForm.getElementsByTagName("A");
	for(var i = 0; i < closeLink.length; i++)
	{
		if(!closeLink[i].className.match("close")) continue;
		
		closeLink[i].onclick = function() {
			hideElement(emailForm);
			return false;
		}
	}
}

/* AJAX right navigation by Venkat
-------------------------------------------------*/
function getXMLHTTP()
{
var xmlHttp;
try
  {
  // Firefox, Opera 8.0+, Safari
  xmlHttp=new XMLHttpRequest();
  }
catch (e)
  {
  // Internet Explorer
  try
    {
    xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
    }
  catch (e)
    {
    try
      {
      xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
      }
    catch (e)
      {
      alert("Your browser does not support AJAX!");
      return false;
      }
    }
  }
  return xmlHttp;
 }


function initRightNav() 
{
	
	container=document.getElementById("section-nav");
	if (container!=null)
	{
		var aElements = container.getElementsByTagName("a");
	initRightNavElement(aElements);
	}
	

	return false;
}

function initRightNavElement(aElements)
{
	for (i=0;i<aElements.length;i++)
	{
		 if (aElements[i].className.indexOf("expand-link")!=-1)
		 {
		   aElements[i].onclick=function()
		   {
			   toggleRightNav(this);
			   return false;
		   }
		 }
	}
  return false;
}

function toggleRightNav(aElement) {
aElementParent=aElement.parentNode;
if(aElement.className.indexOf("expand-link")!=-1)
{
	if(aElementParent.getElementsByTagName("ul").length>0)
	{
		childUL=aElementParent.getElementsByTagName("ul");
		if (aElement.className.indexOf("collapsed")!=-1)
		{
		   childUL[0].className="hidden";
		   aElement.className=aElement.className.replace("collapsed","");
		}
		else
		{
		   childUL[0].className="";
		   aElement.className+=" collapsed";
		 }
	}
	else
	{
	splitStr= aElement.id;
	splitStr=splitStr.split('-');
	pageid=splitStr[0];
	siteid=splitStr[1];
	var xmlHttp=getXMLHTTP();
	if (xmlHttp)
	{
		
		xmlHttp.onreadystatechange=function()
		{
						 
			if(xmlHttp.readyState==4 ) 
			{
			   if (xmlHttp.status==200)
               {			
				aElement.className+=" collapsed";
				
				if (aElementParent.getElementsByTagName("ul").length<=0)
				{
				  	aElementParent.innerHTML+=xmlHttp.responseText;
									   
					var aChildElements = aElementParent.getElementsByTagName("a");
									 
					initRightNavElement(aChildElements);
									  
				}
               }
			   else
				{
                   alert("There was an error processing your request. \nThe error message is "+this.status);
				   
				}
				
			}		
			 
		 }
		
		xmlHttp.open("GET","/portal/pls/portallive/icportal.right_navigation.getNewNavigation?p_pageid="+pageid+"&p_siteid="+siteid,true);
		xmlHttp.send(null);
	}

	}
}
//initRightNav();
return false;
}

/*END of Right navigation
----------------------------------------------*/

/* = EXPANDABLE NAVIGATION
-------------------------------------------------*/

function expandableSection(blockId, expElementType, onClickElementType) {
	if(!document.createElement) return false;
	if(!document.getElementById(blockId) || !expElementType) return false;
	
	var container = document.getElementById(blockId);
	var expElement = container.getElementsByTagName(expElementType);
	
	for(var i = 0; i < expElement.length; i++)
	{
		if(!expElement[i].getElementsByTagName("UL").length) continue;
		if(expElement[i].className) {
			expElement[i].className += " expandable";
		}
		else {
			expElement[i].className = "expandable";
		}
		var expLink = expElement[i].getElementsByTagName("A")[0];
		
		var link = document.createElement("A");
		link.setAttribute("href", "#");
		link.setAttribute("title", "Click here to expand the list");
		link.className = "expand-link";
		
		expElement[i].insertBefore(link, expLink);
		
		link.onclick = function() {
			var parentLi = this.parentNode;
			// grab the first list
			var subList = parentLi.getElementsByTagName("UL")[0];
			
			if(subList.className.match("hidden")) {
				showElement(subList);
				if(this.className) {
					this.className += " collapsed";
				}
				else {
					this.className = "collapsed";
				}
			}
			else {
				hideElement(subList)
				this.className = this.className.replace(/ ?collapsed ?/g, "");
			}
			
			return false;
		}
	}
	
	return 0;
}

/* = HIDE ELEMENT
-------------------------------------------------*/

function hideElement(element) {
	if(!element || element.className.match("hidden")) return false;
	
	if(element.className) {
		element.className += " hidden";
	}
	else {
		element.className = "hidden";
	}
	
	return 0;
}

/* = SHOW ELEMENT
-------------------------------------------------*/

function showElement(element) {
	if(!element || !element.className.match("hidden")) return false;
	
	element.className = element.className.replace(/ ?hidden ?/g, "");
	
	return 0;
}

/* INITIALIZE ALL FUNCTION AFTER WINDOW ONLOAD
-------------------------------------------------*/

function init() {
	if(!document.getElementById || !document.getElementsByTagName) return 0;
	// prep functions
	prepFeaturedNews();
	clickClear();
	prepPrintLinks();
	//expandableSection("section-nav", "LI", "IMG");
	initRightNav() 
	prepEmailFriend();
	prepInputs();
	prepFormReset();
	loadCookieIframe();
         hideAddTab();
}

addLoadEvent(init);

/* = ON LOAD
---------------------------------------------------------------
	add the on load events
---------------------------------------------------------------*/
function addLoadEvent(func) {
	var oldOnLoad = window.onload
	if (typeof window.onload != 'function') 
	{
		window.onload = func;
	}
	else {
		window.onload = function() {
			oldOnLoad();
			func();
		}
	}
}

//To change pwclogin cookie domain
function loadCookieIframe()	{
	if($.browser.msie)
	{
	 $.ajax({cache:false,url:'/PWCLogin/midcookies.jsp'});
	 setTimeout("$.ajax({cache:false,url:'/PWCLogin/midcookies.jsp'})",200);
	}
	else
	{
		$.ajax({cache:false,url:'/PWCLogin/midcookies.jsp'});
	}
}

// Function to hide "Add Tab" link on 
//templates to avoid future errors

function hideAddTab()
{
  $('img[alt="Add Tab"]').hide();
}


var htmlObjRemoved = [];
function htmlOverFlash(){	
	if($('object').length){
		$('object').each(function(){
			$(this).css('display','none');
			htmlObjRemoved.push($(this));
		});
	}
	if($('embed').length){
		$('embed').each(function(){
			$(this).css('display','none');
			htmlObjRemoved.push($(this));
		});
	}  
}

function restoreHtmlFlash(){
	for (var i in htmlObjRemoved){
		$(htmlObjRemoved[i]).css('display','block');
		delete htmlObjRemoved[i];
	}
}


//JQUERY READY FUNCTION 
$(function(){		   
// Expandable nav
	if ($(".expandable").length) {
		$(".expandable li").each(function() {
			if ($(this).children('ul').length) {			
				var c = ($(this).children('ul').hasClass('hidden')) ? '' : ' collapsed'; 
				var title = (c) ? 'contract' :'expand' ;
				$(this).addClass("expandable")
						.prepend('<a href="#" title="Click here to '+title+'" class="expand-link'+c+'"></a>');
			}
		});
		$('.expand-link').click(function(){
			if($(this).siblings('ul').hasClass('hidden')){				
				$(this).addClass('collapsed')
						.attr('title','Click here to contract')
						.siblings('ul')
						.removeClass('hidden');
			} else {
				$(this).removeClass('collapsed')
						.attr('title','Click here to expand')
						.siblings('ul')
						.addClass('hidden');
			}
			return false;
		});
	}
	
//Jquery Search icon on/off - edit
	$('#searchQuery')
		.focus(function(){$('#searchQuery').css('background','#e0eaf2');})
		.blur(function() {
				($('#searchQuery').val())||
						$('#searchQuery').css('background' , '#e0eaf2 url(http://www3.imperial.ac.uk/pls/portallive/docs/1/65329697.GIF) left no-repeat');
			});

//JQuery Auto load media player
	if($('#flashcontainer').length){
		GLoad.Load([
			{
				name	: "mediaplayer",
				dependant:"jScrollPane.js",
				css		:true,
				params	: {}
			}
		]);
	}
	
//social media append referer to url
	$('.socialBoMa a').each(function(){
	   var href =  $(this).attr('href') + '&ref='+document.location.href;
	   $(this).attr('href',href);
	});
	
	/*
		check if there is an edit content reqion on the page
		dynamically embeds tinymce to the page
	*/
	if($('.edit').length){
		var e = document.createElement('script'),
		head = document.getElementsByTagName("head")[0];
		e.type = 'text/javascript';
		e.src = 'http://'+document.domain + '/tinymcetest/jscripts/tiny_mce/tiny_mce.js';
		head.appendChild(e);
		editable = true;
	}	
    GLoad.Load([
	{
		name : "overlay",
		css  :true,
		params : {}
    }
    ]);                 

	$(".reportOC").click(function()
	{
	   addoverlay.htmlContent('<div class="OChead"><span>Report incorrect content</span><a href="#"><img border="0" src="http://www3.imperial.ac.uk/icimages?p_imgid=23076" alt="Close" class="OCclose" /></a></div><form method="get" action=""><fieldset><p>Name (optional)</p><input type="text" name="username" style="width:95%" /><p><br />Email address (optional)</p><input type="text" name="useremail" style="width:95%" /><p><br/>Please give a brief description of the problem:</p><label for="Description"></label><textarea name="Description" id ="reportContent" cols="76" rows="7"></textarea></p></fieldset><div id="submitOutdatedContent" class="form-buttons"><input type="image" alt="Submit" src="/2007templates/images/button_submit.gif"></div></form>', 380, 240);

		$("#submitOutdatedContent").click(function() {        
			var msg = $("#reportContent").val(),
			url = location.href,
			user = $("input[name=useremail]").val(),
			username = $("input[name=username]").val();
			var dataString = {msg: msg, page: url, email: user, name: username};
			$.ajax({
				type: "GET",
				url: "http://www2.imperial.ac.uk/utils/mail/report_problem",
				data: dataString,
				dataType: "jsonp",
				success: function(e) {alert(e);}
			});
			$('#wrap').remove();
			restoreHtmlFlash();
			return false;
		});

		$('.OCclose').click(function(){
			$('#wrap').remove();
			restoreHtmlFlash();
			return false;
		});
		htmlOverFlash();
		return false;
	});
	/*DYNAMIC AD*/
	if($('.dynamicAdWrapper').length > 0)
	{
		var dOutput = '';
		$.getJSON('http://www2.imperial.ac.uk/utils/dynamic/flexible_ad.php?url='+ location.href +'&jsonCallBack=?',function(j){                                
			$(j).each(function(i){
				if(j)
				{
					if(j[i].image){
						dOutput += '<div class="quick-info-block">';
						dOutput += '<div class="photo"><img class="photo-image" src="http://www3.imperial.ac.uk/icimages?p_imgid='+j[i].image+'" alt="dynamic ad" />';
						dOutput += '<div class="caption">';
						dOutput += '<div class="caption-inside">';
						dOutput += '<p><a href="../aboutus_files/'+j[i].link+'" class="dynamicAdLink">'+j[i].text+'</a></p>';
						dOutput += '</div></div></div></div>';                
					}
				}
			});		
			$('.dynamicAdWrapper').html(dOutput);
		});
	}
	//GOOGLE analytics document download tracker
	if(typeof pageTracker !== 'undefined'){
		var filetypes = ['xls', 'csv', 'pdf', 'doc', 'docx', 'ppt', 'zip'];
		$('a').each(function(){
			var href = $(this).attr('href');
			if(href && (href.indexOf('imperial')!=-1 || href.indexOf('/portal/page/portallive/')!=-1)){
				var ext = href.substr(href.length-3,href.length);
				if($.inArray(ext,filetypes) != -1){
					$(this).attr("onclick","javascript: pageTracker._trackPageview('/files/downloads/__"+window.location.pathname + '/' + href.substr(href.lastIndexOf('/'), href.length)+"');");
				}
			}  
		});
	}
});
// End JQuery

function openOverlayEditor(dat) {
	if(editable){
		if($('#wrap').length){
			$('#wrap').remove();
			$('#editor-window').remove();		
		}
		var url = dat.url;
		delete dat.url;
		$.ajax({
			url:url,
			type:'GET',
			data : dat,
			success:function(d){
					$('body').append('<div id="wrap"> </div>'+d);
					htmlOverFlash();
					return false;
			},
			error:function(e){
				alert("Error");
			}
		});
	}
}


/*
	Helper functions
*/
function isArray (o){
	if (undefined === o) return "undefined";
	if (null === o) return "null";
	return {}.toString.call(o).slice(8, -1).toLowerCase();
}

/*
	Replace old writeflash function
*/
function writeFlash(a,b,c){
	this['writeFlash'] = [a,b,c];
}
/*
	Global variable for feeds
*/
var objFeeds = {};

/*
	function for old Plugin calls
*/
function Plugin(l, t) {
	GLoad.Load(l, t);
}
/*
	GLoad plugin function
*/
var GLoad = {
	pluginURL : null,
	LoadFeed : function(f,n,jc,cb){
					$.getJSON(f+jc+'=?',function(j){
						objFeeds[n] = j;
						if(cb){
							cb(j);
						}
					});
	},
	Each : function (a, f) {
			for (var i = 0, l = a.length; i < l; i++){
				f(a[i]);
			}
	},
	Script : function(f, c){
				var e = document.createElement((c) ? 'link': 'script'),
					type = (c) ? 'css': 'javascript',
					url = GLoad.pluginURL + f;
				e.type = 'text/' + type;

				if (c) {
					e.rel = 'stylesheet';
					e.href = url + '/' + f + '.css';
				} else {
					e.id = f + '-js';
					e.src = (f.substr(f.length-3,f.length) =='.js') ? url :url + '/' + f + '.js';
				}
				var head = document.getElementsByTagName("head")[0];
				if (e !== undefined) {
					head.appendChild(e);
					
					if ($.browser.msie && $.browser.version <= 7) //add extra css for IE 6 +7
					{
						var IEcss = document.createElement('link');
						IEcss.type = 'text/css';
						IEcss.rel = 'stylesheet';
						
						var IEfile = ($.browser.msie && $.browser.version < 7) ? '_ie6.css' : '_ie7.css';
						IEcss.href = url + '/' + f + IEfile;
						head.appendChild(IEcss);							
					}
					return true;
				}	
	},
	LoadPlugin : function(f, p){
					setTimeout(function() {
						if (document.getElementById(f + '-js')) {
							//add the feed stuff here							
								if(p.jquery && typeof JQuery == 'function'){
									this[f] = new Function('p',"$((p.container) ? '#'+p.container: '#"+f+"')."+f+"(p);");
								}
								this[f](p);
								if(p.feed){
									if(p.feed.length > 1){
										//load all feeds not yet in use 
									} else {
										//only one feed being used.
										//check if a name is set else use the plugin name						
										GLoad.LoadFeed(p.feed[0].url,(p.feed[0].name) ? p.feed[0].name : f,p.feed[0].callback);
									}				
								}
								if(p.cufon && typeof Cufon == 'function'){
									Cufon.replace(p.cufon);
								}
								//call the function / plugin constructor										
								//if browser is less than 7
								if ($.browser.msie && $.browser.version < 7) {
									if (typeof p.ie6 != 'undefined' && !document.getElementById('ie6-js')) {
										GLoad.Load(p.ie6);
									}
								}
						}
						//else run again
						else GLoad.LoadPlugin(f, p);
					},
					500);
	},
	Load : function(l,t){
				GLoad.pluginURL = (t) ? 'http://icwwwd.cc.ic.ac.uk/imedia/plugins/' : 'http://www.imperial.ac.uk/imedia/plugins/';
				if(isArray(l)==='string'){
					GLoad.Script(l);
				} else {
					GLoad.Each(l, function(i) {
						if(GLoad.Script(i.name)) GLoad.LoadPlugin(i.name, i.params);
						if (i.css) GLoad.Script(i.name, true);
						if (i.dependant) GLoad.Script(i.dependant);			
					});
				}	
	}
}