// modal code
var gmodalMask = null;
var gmodalContainer = null;
var gPopFrame = null;
var gReturnFunc;
var gmodalIsShown = false;
var gHideSelects = false;


var gTabIndexes = new Array();
// Pre-defined list of tags we want to disable/enable tabbing into
var gTabbableTags = new Array("A","BUTTON","TEXTAREA","INPUT","IFRAME");

// If using Mozilla or Firefox, use Tab-key trap.
if (!document.all) {
	document.onkeypress = keyDownHandler;
}

/**
 * Initializes modal code on load.
 */
function init() {
	// Add the HTML to the body
	theBody = document.getElementsByTagName('BODY')[0];
	popmask = document.createElement('div');
	popmask.id = 'modalMask';
	popcont = document.createElement('div');
	popcont.id = 'modalContainer';
	popcont.innerHTML = '' +
		'<div id="modalInner">' +
			'<div id="modalTitleBar">' +
				'<div id="modalTitle"></div>' +
				'<div id="modalControls">' +
					'<img src="img/moo/close.png" onclick="hideModal(false);" id="popCloseBox" />' +
				'</div>' +
			'</div>' +
			'<iframe src="js/modal.html" scrolling="auto" frameborder="0" allowtransparency="true" id="modalFrame" name="modalFrame" width="100%" height="100%"></iframe>' +
		'</div>';
	theBody.appendChild(popmask);
	theBody.appendChild(popcont);

	gmodalContainer = $("modalContainer");
	gmodalMask = $("modalMask");
	gPopFrame = $("modalFrame");

	// check to see if this is IE version 6 or lower. hide select boxes if so
	// maybe they'll fix this in version 7?
	var brsVersion = parseInt(window.navigator.appVersion.charAt(0), 10);
	if (brsVersion <= 6 && window.navigator.userAgent.indexOf("MSIE") > -1) {
		gHideSelects = true;
	}

	// Add onclick handlers to 'a' elements of class submodal or submodal-width-height
	var elms = document.getElementsByTagName('a');
	for (i = 0; i < elms.length; i++) {
		if (elms[i].rel.indexOf("modal") == 0) {
			// var onclick = 'function (){showModal(\''+elms[i].href+'\','+width+', '+height+', null);return false;};';
			// elms[i].onclick = eval(onclick);
			elms[i].onclick = function(){
				// default width and height
				var width = 480;
				var height = 510;
				// Parse out optional width and height from className
				params = this.rel.split(' ');
				if (params.length == 3) {
					width = parseInt(params[1]);
					height = parseInt(params[2]);
				}
				showModal(this.href,width,height,null); return false;
			}
		}
	}
	if (location.search.substring(1) == "request") showModal("request.php", 480, 530,null);
}
Window.onDomReady(init);

 /**
	* @argument width - int in pixels
	* @argument height - int in pixels
	* @argument url - url to display
	* @argument returnFunc - function to call when returning true from the window.
	* @argument showCloseBox - show the close box - default true
	*/

function showModal(url, width, height, returnFunc, showCloseBox) {
	// show or hide the window close widget
	if (showCloseBox == null || showCloseBox == true) {
		document.getElementById("popCloseBox").style.display = "block";
	} else {
		document.getElementById("popCloseBox").style.display = "none";
	}
	gmodalIsShown = true;
	disableTabIndexes();
	gmodalMask.style.display = "block";
	gmodalMask.onclick = function(){hideModal(false)};
	gmodalContainer.style.display = "block";
	// calculate where to place the window on screen
	centerModal(width, height);

	var titleBarHeight = parseInt(document.getElementById("modalTitleBar").offsetHeight, 10);


	gmodalContainer.style.width = width + "px";
	gmodalContainer.style.height = (height+titleBarHeight) + "px";

	setMaskSize();

	// need to set the width of the iframe to the title bar width because of the dropshadow
	// some oddness was occuring and causing the frame to poke outside the border in IE6
	gPopFrame.style.width = parseInt(document.getElementById("modalTitleBar").offsetWidth, 10) + "px";
	gPopFrame.style.height = (height) + "px";

	// set the url
	window.setTimeout(function(){gPopFrame.src = url}, "1000");

	gReturnFunc = returnFunc;
	// for IE
	if (gHideSelects == true) {
		toggleSelectBoxes();
	}
}

//
var gi = 0;
function centerModal(width, height) {
	if (gmodalIsShown == true) {
		if (width == null || isNaN(width)) {
			width = gmodalContainer.offsetWidth;
		}
		if (height == null) {
			height = gmodalContainer.offsetHeight;
		}

		//var theBody = document.documentElement;
		var theBody = document.getElementsByTagName("BODY")[0];
		theBody.style.overflow = "hidden";

		var scTop = parseInt(theBody.scrollTop,10);
		var scLeft = parseInt(theBody.scrollLeft,10);

		gmodalMask.style.top = scTop + "px";
		gmodalMask.style.left = scLeft + "px";

		setMaskSize();

		//window.status = gmodalMask.style.top + " " + gmodalMask.style.left + " " + gi++;

		var titleBarHeight = parseInt(document.getElementById("modalTitleBar").offsetHeight, 10);

		var fullHeight = getViewportHeight();
		var fullWidth = getViewportWidth();

		gmodalContainer.style.top = (scTop + ((fullHeight - (height+titleBarHeight)) / 2)) + "px";
		gmodalContainer.style.left =  (scLeft + ((fullWidth - width) / 2)) + "px";
		//alert(fullWidth + " " + width + " " + gmodalContainer.style.left);
	}
}
addEvent(window, "resize", centerModal);
//addEvent(window, "scroll", centerModal);
window.onscroll = centerModal;

/**
 * Sets the size of the modal mask.
 *
 */
function setMaskSize() {
	var theBody = document.getElementsByTagName("BODY")[0];

	var fullHeight = getViewportHeight();
	var fullWidth = getViewportWidth();

	// Determine what's bigger, scrollHeight or fullHeight / width
	if (fullHeight > theBody.scrollHeight) {
		popHeight = fullHeight;
	} else {
		popHeight = theBody.scrollHeight;
	}

	if (fullWidth > theBody.scrollWidth) {
		popWidth = fullWidth;
	} else {
		popWidth = theBody.scrollWidth;
	}

	gmodalMask.style.height = popHeight + "px";
	gmodalMask.style.width = popWidth + "px";
}

/**
 * @argument callReturnFunc - bool - determines if we call the return function specified
 * @argument returnVal - anything - return value
 */
function hideModal(callReturnFunc) {
	gmodalIsShown = false;
	var theBody = document.getElementsByTagName("BODY")[0];
	theBody.style.overflow = "";
	restoreTabIndexes();
	if (gmodalMask == null) {
		return;
	}
	gmodalMask.style.display = "none";
	gmodalContainer.style.display = "none";
	if (callReturnFunc == true && gReturnFunc != null) {
		gReturnFunc(window.frames["modalFrame"].returnVal);
	}
	gPopFrame.src = 'js/modal.html';
	// display all select boxes
	if (gHideSelects == true) {
		toggleSelectBoxes();
	}
}

function keyDownHandler(e) {
    if (gmodalIsShown && e.keyCode == 9)  return false;
}

function disableTabIndexes() {
	if (document.all) {
		var i = 0;
		for (var j = 0; j < gTabbableTags.length; j++) {
			var tagElements = document.getElementsByTagName(gTabbableTags[j]);
			for (var k = 0 ; k < tagElements.length; k++) {
				gTabIndexes[i] = tagElements[k].tabIndex;
				tagElements[k].tabIndex="-1";
				i++;
			}
		}
	}
}

function restoreTabIndexes() {
	if (document.all) {
		var i = 0;
		for (var j = 0; j < gTabbableTags.length; j++) {
			var tagElements = document.getElementsByTagName(gTabbableTags[j]);
			for (var k = 0 ; k < tagElements.length; k++) {
				tagElements[k].tabIndex = gTabIndexes[i];
				tagElements[k].tabEnabled = true;
				i++;
			}
		}
	}
}

function toggleSelectBoxes() {
	for(var i = 0; i < document.forms.length; i++) {
		for(var e = 0; e < document.forms[i].length; e++){
			var elem = document.forms[i].elements[e];
			if(elem.tagName == "SELECT") {
				elem.style.visibility = (elem.style.visibility != "hidden") ? "hidden" : "visible";
			}
		}
	}
}

/**
 * COMMON DHTML FUNCTIONS
 * These are handy functions I use all the time.
 *
 * By Seth Banks (webmaster at subimage dot com)
 * http://www.subimage.com/
 *
 * Up to date code can be found at http://www.subimage.com/dhtml/
 *
 * This code is free for you to use anywhere, just keep this comment block.
 */

/**
 * X-browser event handler attachment and detachment
 * TH: Switched first true to false per http://www.onlinetools.org/articles/unobtrusivejavascript/chapter4.html
 *
 * @argument obj - the object to attach event to
 * @argument evType - name of the event - DONT ADD "on", pass only "mouseover", etc
 * @argument fn - function to call
 */
function addEvent(obj, evType, fn){
 if (obj.addEventListener){
    obj.addEventListener(evType, fn, false);
    return true;
 } else if (obj.attachEvent){
    var r = obj.attachEvent("on"+evType, fn);
    return r;
 } else {
    return false;
 }
}

/**
 * Code below taken from - http://www.evolt.org/article/document_body_doctype_switching_and_more/17/30655/
 *
 * Modified 4/22/04 to work with Opera/Moz (by webmaster at subimage dot com)
 *
 * Gets the full width/height because it's different for most browsers.
 */
function getViewportHeight() {
	if (window.innerHeight!=window.undefined) return window.innerHeight;
	if (document.compatMode=='CSS1Compat') return document.documentElement.clientHeight;
	if (document.body) return document.body.clientHeight;
	return window.undefined;
}
function getViewportWidth() {
	if (window.innerWidth!=window.undefined) return window.innerWidth;
	if (document.compatMode=='CSS1Compat') return document.documentElement.clientWidth;
	if (document.body) return document.body.clientWidth;
	return window.undefined;
}