/*
Created By: Chris Campbell
Website: http://particletree.com
Date: 2/1/2006

Inspired by the lightbox implementation found at http://www.huddletogether.com/projects/lightbox/
*/

/*-------------------------------GLOBAL VARIABLES------------------------------------*/

var detect = navigator.userAgent.toLowerCase();
var OS,browser,version,total,thestring;

/*-----------------------------------------------------------------------------------------------*/

var loadingImage = '/images/lightbox/loading.gif';

//Browser detect script origionally created by Peter Paul Koch at http://www.quirksmode.org/

function getBrowserInfo() {
	if (checkIt('konqueror')) {
		browser = "Konqueror";
		OS = "Linux";
	}
	else if (checkIt('safari')) browser 	= "Safari"
	else if (checkIt('omniweb')) browser 	= "OmniWeb"
	else if (checkIt('opera')) browser 		= "Opera"
	else if (checkIt('webtv')) browser 		= "WebTV";
	else if (checkIt('icab')) browser 		= "iCab"
	else if (checkIt('msie')) browser 		= "Internet Explorer"
	else if (!checkIt('compatible')) {
		browser = "Netscape Navigator"
		version = detect.charAt(8);
	}
	else browser = "An unknown browser";

	if (!version) version = detect.charAt(place + thestring.length);

	if (!OS) {
		if (checkIt('linux')) OS 		= "Linux";
		else if (checkIt('x11')) OS 	= "Unix";
		else if (checkIt('mac')) OS 	= "Mac"
		else if (checkIt('win')) OS 	= "Windows"
		else OS 								= "an unknown operating system";
	}
}

function checkIt(string) {
	place = detect.indexOf(string) + 1;
	thestring = string;
	return place;
}

/*-----------------------------------------------------------------------------------------------*/

Event.observe(window, 'load', initialize, false);
Event.observe(window, 'load', getBrowserInfo, false);
Event.observe(window, 'unload', Event.unloadCache, false);

var lightbox = Class.create();

lightbox.prototype = {

	yPos : 0,
	xPos : 0,

	initialize: function(ctrl) {
		this.content = ctrl.href;
		Event.observe(ctrl, 'click', this.activate.bindAsEventListener(this), false);
		ctrl.onclick = function(){return false;};
	},
	
	// Turn everything on - mainly the IE fixes
	activate: function(){
		if (browser == 'Internet Explorer'){
			this.getScroll();
			this.prepareIE('100%', 'hidden');
			this.setScroll(0,0);
			this.hideSelects('hidden');
		}
		this.displayLightbox("block");
	},
	
	// Ie requires height to 100% and overflow hidden or else you can scroll down past the lightbox
	prepareIE: function(height, overflow){
		bod = document.getElementsByTagName('body')[0];
		bod.style.height = height;
		bod.style.overflow = overflow;
  
		htm = document.getElementsByTagName('html')[0];
		htm.style.height = height;
		htm.style.overflow = overflow; 
	},
	
	// In IE, select elements hover on top of the lightbox
	hideSelects: function(visibility){
		selects = document.getElementsByTagName('select');
		for(i = 0; i < selects.length; i++) {
			selects[i].style.visibility = visibility;
		}
	},
	
	// Taken from lightbox implementation found at http://www.huddletogether.com/projects/lightbox/
	getScroll: function(){
		if (self.pageYOffset) {
			this.yPos = self.pageYOffset;
		} else if (document.documentElement && document.documentElement.scrollTop){
			this.yPos = document.documentElement.scrollTop; 
		} else if (document.body) {
			this.yPos = document.body.scrollTop;
		}
	},
	
	setScroll: function(x, y){
		window.scrollTo(x, y); 
	},
	
	displayLightbox: function(display){
		$('overlay').style.display = display;
		$('lightbox').style.display = display;
		swfobject.embedSWF("/swf/Facts.swf", "cloud", "90", "90", "8.0.0", null, null, {wmode:"transparent"});
		$('cloud').style.display = display;
		if(display != 'none') this.loadInfo();
	},
	
	// Begin Ajax request based off of the href of the clicked linked
	loadInfo: function() {
		var myAjax = new Ajax.Request(
        this.content,
        {method: 'get', parameters: "", onComplete: this.processInfo.bindAsEventListener(this)}
		);
		
	},
	
	// Display Ajax response
	processInfo: function(response){
		info = "<div id='lbContent'>" + response.responseText + "</div>";
		new Insertion.Before($('lbLoadMessage'), info)
		$('lightbox').className = "done";	
		this.actions();			
	},
	
	// Search through new links within the lightbox, and attach click event
	actions: function(){
		lbActions = document.getElementsByClassName('lbAction');

		for(i = 0; i < lbActions.length; i++) {
			Event.observe(lbActions[i], 'click', this[lbActions[i].rel].bindAsEventListener(this), false);
			lbActions[i].onclick = function(){return false;};
		}

	},
	
	
	// Example of creating your own functionality once lightbox is initiated
	insert: function(e){
	   link = Event.element(e);   
	   Element.remove($('lbContent'));
	 
	   var myAjax = new Ajax.Request(
			  link.href,
			  {method: 'post', parameters: "", onComplete: this.processInfo.bindAsEventListener(this)}
	   );
	 
	},
	
	
	// Main posting function
	DoPost: function(e){
		
		link = Event.element(e).parentNode;		
		 var parameterString = Form.serialize('frmsurvey'); 

		//TP20081120 - Usual onclick/submit does not work, go by link params:
		if(!IsFormValid(link.href, parameterString))
		{
			return false;
		}

		 Element.remove($('lbContent'));	  
		
		alert(link.href);

	   var myAjax = new Ajax.Request(
			  link.href,
			  {method: 'post', postBody: parameterString, onComplete: this.processInfo.bindAsEventListener(this)}
			  
	   );
	 
	},
	
	
	
	// Example of creating your own functionality once lightbox is initiated
	deactivate: function(){
		Element.remove($('lbContent'));
		
		if (browser == "Internet Explorer"){
			this.setScroll(0,this.yPos);
			this.prepareIE("auto", "auto");
			this.hideSelects("visible");
		}
		
		this.displayLightbox("none");
	}
}

/*-----------------------------------------------------------------------------------------------*/

// Onload, make all links that need to trigger a lightbox active
function initialize(){
	addLightboxMarkup();
	lbox = document.getElementsByClassName('lbOn');
	for(i = 0; i < lbox.length; i++) {
		valid = new lightbox(lbox[i]);
	}
}

// Add in markup necessary to make this work. Basically two divs:
// Overlay holds the shadow
// Lightbox is the centered square that the content is put into.
function addLightboxMarkup() {
	bod 				= document.getElementsByTagName('body')[0];
	cloud				= document.createElement('div');
	cloud.id		= 'cloud';
	overlay 			= document.createElement('div');
	overlay.id		= 'overlay';
	lb					= document.createElement('div');
	lb.id				= 'lightbox';
	lb.className 	= 'loading';
	lb.innerHTML	= '<div id="lbLoadMessage">' +
						  '<p>Loading</p>' +
						  '</div>';
	bod.appendChild(overlay);
	bod.appendChild(lb);
	bod.appendChild(cloud);
	//alert(cloud);
}


	//var arrayPageSize = getPageSize();
	//var arrayPageScroll = getPageScroll();


//
// getPageScroll()
// Returns array with x,y page scroll values.
// Core code from - quirksmode.org
//
function getPageScroll(){

	var yScroll;

	if (self.pageYOffset) {
		yScroll = self.pageYOffset;
	} else if (document.documentElement && document.documentElement.scrollTop){	 // Explorer 6 Strict
		yScroll = document.documentElement.scrollTop;
	} else if (document.body) {// all other Explorers
		yScroll = document.body.scrollTop;
	}

	arrayPageScroll = new Array('',yScroll) 
	return arrayPageScroll;
}



//
// getPageSize()
// Returns array with page width, height and window width, height
// Core code from - quirksmode.org
// Edit for Firefox by pHaez
////
//function getPageSize(){
//	
//	var xScroll, yScroll;
//	
//	if (window.innerHeight && window.scrollMaxY) {	
//		xScroll = document.body.scrollWidth;
//		yScroll = window.innerHeight + window.scrollMaxY;
//	} else if (document.body.scrollHeight > document.body.offsetHeight){ // all but Explorer Mac
//		xScroll = document.body.scrollWidth;
//		yScroll = document.body.scrollHeight;
//	} else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
//		xScroll = document.body.offsetWidth;
//		yScroll = document.body.offsetHeight;
//	}
//	
//	var windowWidth, windowHeight;
//	if (self.innerHeight) {	// all except Explorer
//		windowWidth = self.innerWidth;
//		windowHeight = self.innerHeight;
//	} else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode
//		windowWidth = document.documentElement.clientWidth;
//		windowHeight = document.documentElement.clientHeight;
//	} else if (document.body) { // other Explorers
//		windowWidth = document.body.clientWidth;
//		windowHeight = document.body.clientHeight;
//	}	
//	
//	// for small pages with total height less then height of the viewport
//	if(yScroll < windowHeight){
//		pageHeight = windowHeight;
//	} else { 
//		pageHeight = yScroll;
//	}
//
//	// for small pages with total width less then width of the viewport
//	if(xScroll < windowWidth){	
//		pageWidth = windowWidth;
//	} else {
//		pageWidth = xScroll;
//	}
//
//	arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight) 
//	return arrayPageSize;
//}
//



////////////////////////////////////////////////////////////////// resize the js lightbox


//--Resize  background--//
var windowW =800;
var windowH =600;
var pageW = windowW;
var pageH = windowH;
//
var exScroll = 0;
var scrollToggle = false

window.onscroll= window_scroll;
window.onresize = window_scroll;

function window_scroll(){
	var bg = document.getElementById('overlay')
	if (bg!=null){
	scrollToggle = true
		var bg = document.getElementById('overlay')
		var size = getSize() + getScroll();
		if (exScroll < size){
			exScroll = size;
			bg.style.height =  size + "px";
			bg.style.width =  "100%";
		}

	}
}

////////////////////////////////////////////////////////scroll scripts
//var arrayPageSize = getPageSize();
//var arrayPageScroll = getPageScroll();
//
////Get the browser window size
function getSize() {
  var myWidth = 0, myHeight = 0;
  if( typeof( window.innerWidth ) == 'number' ) {
    //Non-IE
    myWidth = window.innerWidth;
    myHeight = window.innerHeight;
  } else if( document.documentElement && ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) {
    //IE 6+ in 'standards compliant mode'
    myWidth = document.documentElement.clientWidth;
    myHeight = document.documentElement.clientHeight;
  } else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) {
    //IE 4 compatible
    myWidth = document.body.clientWidth;
    myHeight = document.body.clientHeight;
  }
  return myHeight;
}
//Get page scroll offset//
function getScroll() {
  var scrOfX = 0, scrOfY = 0;
  if( typeof( window.pageYOffset ) == 'number' ) {
    //Netscape compliant
    scrOfY = window.pageYOffset;
    scrOfX = window.pageXOffset;
 } else if( document.body && ( document.body.scrollLeft || document.body.scrollTop ) ) {
    //DOM compliant
    scrOfY = document.body.scrollTop;
    scrOfX = document.body.scrollLeft;
  } else if( document.documentElement && ( document.documentElement.scrollLeft || document.documentElement.scrollTop ) ) {
    //IE6 standards compliant mode
    scrOfY = document.documentElement.scrollTop;
    scrOfX = document.documentElement.scrollLeft;
  }
  return scrOfY;
}




	//TP20081120 - add some validation
	function IsFormValid(linkHref, parameterString)
	{
		linkHref = linkHref.toLowerCase();
		if(linkHref.indexOf("?p=") == -1)
		{
			return true;
		}

		parameterString = parameterString + "&"; //See indexOf validation hack below, checking serialied form string for empty fields		
		var frm = document.forms[0];
		var pageId = linkHref.substring(linkHref.indexOf("?p=")+3)

		switch(pageId)
		{
			case "1":
				if(parameterString.indexOf("txtname=&") > -1)
				{	
					alert("School name is required.");
					frm.txtname.focus();
					return false;
				}
				if(parameterString.indexOf("txtPC=&") > -1)
				{	
					alert("Post code is required.");
					frm.txtPC.focus();
					return false;
				}
				if(parameterString.indexOf("txtannualuse=&") > -1)
				{	
					alert("Annual use is required.");
					frm.txtannualuse.focus();
					return false;
				}
				break;
			case "2":
				if(parameterString.indexOf("txtname2=&") > -1)
				{	
					alert("School name is required.");
					frm.txtname2.focus();
					return false;
				}
				if(parameterString.indexOf("txtPC2=&") > -1)
				{	
					alert("Post code is required.");
					frm.txtPC2.focus();
					return false;
				}
				if(parameterString.indexOf("txtpwd=&") > -1)
				{	
					alert("Password is required.");
					frm.txtpwd.focus();
					return false;
				}
				break;
			default:
				return true;
				break;
		}

		return true;
	}