/**
* POPUP WINDOW CODE
* Used for displaying DHTML only popups instead of using buggy modal windows.
*
* By Seth Banks (webmaster at subimage dot com)
* http://www.subimage.com/
*
* Contributions by Eric Angel (tab index code) and Scott (hiding/showing selects for IE users)
*
* Up to date code can be found at http://www.subimage.com/dhtml/subModal
*
* This code is free for you to use anywhere, just keep this comment block.
*/

function addEvent(obj, evType, fn){
if (obj.addEventListener){
obj.addEventListener(evType, fn, true);
return true;
} else if (obj.attachEvent){
var r = obj.attachEvent("on"+evType, fn);
return r;
} else {
return false;
}
}
function removeEvent(obj, evType, fn, useCapture){
if (obj.removeEventListener){
obj.removeEventListener(evType, fn, useCapture);
return true;
} else if (obj.detachEvent){
var r = obj.detachEvent("on"+evType, fn);
return r;
} else {
alert("Handler could not be removed");
}
}

/**
* 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;
}

// Popup code
var gPopupMask = null;
var gPopupContainer = null;
var gPopFrame = null;
var gReturnFunc;
var gPopupIsShown = false;
var gPopupTitle = null;

var gHideSelects = false;
var gHideObjects = true;
var gLoadingUrl = null;

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 popup code on load.
*/
function initPopUp() {
gPopupMask = document.getElementById("popupMask");
gPopupContainer = document.getElementById("popupContainer");
gPopFrame = document.getElementById("popupFrame");

// 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;
}
}
addEvent(window, "load", initPopUp);

function renderPopWin(closeIconUrl, loadingUrl)
{
gLoadingUrl=loadingUrl;
document.write("<div id=\"popupMask\" style=\"display: none;\">&nbsp;</div>");
document.write("<div id=\"popupContainer\" style=\"display: none;\">");
document.write("<div id=\"popupInner\">");
document.write("<div id=\"popupTitleBar\">");
document.write("<div id=\"popupTitle\"></div>");
document.write("<div id=\"popupControls\">");
document.write("<img src=\"" + closeIconUrl + "\" onclick=\"hidePopWin(false);\" />");
document.write("</div>");
document.write("</div>");
document.write("<iframe src=\"" + loadingUrl + "\" style=\"width:100%;height:100%;background-color:transparent;\" scrolling=\"auto\" frameborder=\"0\" allowtransparency=\"true\" id=\"popupFrame\" name=\"popupFrame\" width=\"100%\" height=\"100%\"></iframe>");
document.write("</div>");
document.write("</div>");
}

/**
* @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.
*/

function showPopWin(url, width, height, returnFunc) {
gPopupIsShown = true;
disableTabIndexes();
gPopupMask.style.display = "block";
gPopupContainer.style.display = "block";
// calculate where to place the window on screen
centerPopWin(width, height);

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

gPopupContainer.style.width = width + "px";
gPopupContainer.style.height = (height+titleBarHeight) + "px";
// 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("popupTitleBar").offsetWidth, 10) + "px";
gPopFrame.style.height = (height) + "px";
gPopupTitle = window.frames["popupFrame"].document.title;

// set the url
gPopFrame.src = url;

gReturnFunc = returnFunc;
// for IE
if (gHideSelects || gHideObjects) {
hideSelectBoxes();
}

window.setTimeout("setPopTitle();", 249);
}

//
var gi = 0;
function centerPopWin(width, height) {
if (gPopupIsShown == true) {
if (width == null || isNaN(width)) {
width = gPopupContainer.offsetWidth;
}
if (height == null) {
height = gPopupContainer.offsetHeight;
}

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

var theBody = document.documentElement;

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

gPopupMask.style.height = fullHeight + "px";
gPopupMask.style.width = fullWidth + "px";
gPopupMask.style.top = scTop + "px";
gPopupMask.style.left = scLeft + "px";

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

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

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

/**
* @argument callReturnFunc - bool - determines if we call the return function specified
* @argument returnVal - anything - return value
*/
function hidePopWin(callReturnFunc) {
gPopupIsShown = false;
restoreTabIndexes();
if (gPopupMask == null) {
return;
}
gPopupMask.style.display = "none";
gPopupContainer.style.display = "none";
if (callReturnFunc == true && gReturnFunc != null) {
gReturnFunc(window.frames["popupFrame"].returnVal);
}

gPopFrame.src = gLoadingUrl;

// display all select boxes
if (gHideSelects || gHideObjects) {
displaySelectBoxes();
}
}

/**
* Sets the popup title based on the title of the html document it contains.
* Uses a timeout to keep checking until the title is valid.
*/
function setPopTitle() {
if (window.frames["popupFrame"].document.title == null || window.frames["popupFrame"].document.title == gPopupTitle)
{
window.setTimeout("setPopTitle();", 99);
}
else
{
document.getElementById("popupTitle").innerHTML = window.frames["popupFrame"].document.title;
}
}

// Tab key trap. iff popup is shown and key was [TAB], suppress it.
// @argument e - event - keyboard event that caused this function to be called.
function keyDownHandler(e) {
if (gPopupIsShown && e.keyCode == 9)  return false;
}

// For IE.  Go through predefined tags and disable tabbing into them.
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++;
}
}
}
}

// For IE. Restore tab-indexes.
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++;
}
}
}
}


/**
* Hides all drop down form select boxes on the screen so they do not appear above the mask layer.
* IE has a problem with wanted select form tags to always be the topmost z-index or layer
*
* Thanks for the code Scott!
*/
function hideSelectBoxes() {
for(var i = 0; i < document.forms.length; i++) {
for(var e = 0; e < document.forms[i].length; e++){
if( (gHideSelects && document.forms[i].elements[e].tagName == "SELECT")
|| (gHideObjects && document.forms[i].elements[e].tagName == "OBJECT") ) {
document.forms[i].elements[e].style.visibility="hidden";
}
}
}
}

/**
* Makes all drop down form select boxes on the screen visible so they do not reappear after the dialog is closed.
* IE has a problem with wanted select form tags to always be the topmost z-index or layer
*/
function displaySelectBoxes() {
for(var i = 0; i < document.forms.length; i++) {
for(var e = 0; e < document.forms[i].length; e++){
if( (gHideSelects && document.forms[i].elements[e].tagName == "SELECT")
|| (gHideObjects && document.forms[i].elements[e].tagName == "OBJECT") ) {
document.forms[i].elements[e].style.visibility="visible";
}
}
}
}