// Popup code
var gPopupBody = null;
var gPopupMask = null;
var gPopupContainer = null;
var gPopFrame = null;
var gPopupLoading = null;
var gReturnFunc;
var gPopupIsShown = false;
var gIsIE = false;
var gAutoHeight = true;
var gUseFrameBase = true;

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() {
    // Add the HTML to the body
    gPopupBody = document.getElementsByTagName('body')[0];
    var popmask = document.createElement('div');
    popmask.id = 'popupMask';
    var popcont = document.createElement('div');
    popcont.id = 'popupContainer';
    popcont.innerHTML = '' +
        '<div id="popupInner">' +
            '<div id="popupTitleBar">' +
                '<div id="popupTitle"></div>' +
                '<div id="popupControls">' +
                    '<a onclick="hidePopWin(true);"><span>Close</span></a>' +
                '</div>' +
            '</div>' +
            '<iframe style="width:100%;height:100%" scrolling="auto" frameborder="0" allowtransparency="true" id="popupFrame" name="popupFrame" width="100%" height="100%"></iframe>' +
            '<div id="popupLoading"><span>Loading... Please wait...</span></div>' +
        '</div>';
    gPopupBody.appendChild(popmask);
    gPopupBody.appendChild(popcont);
    
    gPopupMask = document.getElementById("popupMask");
    gPopupContainer = document.getElementById("popupContainer");
    gPopFrame = document.getElementById("popupFrame");  
    gPopupLoading = document.getElementById("popupLoading");    
    
    // check to see if this is IE version 6 or lower.
    var brsVersion = parseInt(window.navigator.appVersion.charAt(0), 10);
    if (brsVersion <= 6 && window.navigator.userAgent.indexOf("MSIE") > -1) {
        gIsIE = 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].className.indexOf("submodal") >= 0) { 
            elms[i].onclick = function(){
                // default width and height
                var width = null;
                var height = null;
                // Parse out optional width and height from className
                var startIndex = this.className.indexOf("submodal");
                var endIndex = this.className.indexOf(" ", startIndex);
                if (endIndex < 0) {
                    endIndex = this.className.length;
                }
                var clazz = this.className.substring(startIndex, endIndex);
                params = clazz.split('-');
                if (params.length == 3) {
                    width = parseInt(params[1]);
                    height = parseInt(params[2]);
                }
                showPopWin2(this.href,width,height,null); return false;
            }
        }
    }
}
addEvent(window, "load", initPopUp);

 /**
    * @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();
    gPopupBody.className += ' popupShown'
    gPopupLoading.style.display = 'block';
    centerPopWin(width, height);
    var titleBarHeight = parseInt(document.getElementById("popupTitleBar").offsetHeight, 10);
    gPopupContainer.style.width = width + "px";
    gPopupContainer.style.height = (height+titleBarHeight) + "px";
    gPopupLoading.style.left = 0;
    gPopupLoading.style.top = 0;
    gPopupLoading.style.width = gPopupContainer.style.width;
    gPopupLoading.style.height = gPopupContainer.style.height;
    gPopFrame.style.width = (parseInt(document.getElementById("popupTitleBar").offsetWidth, 10) - 1) + "px";
    gPopFrame.style.height = (height) + "px";
    if (!gIsIE) {
        gPopFrame.onload = null;
        gPopFrame.onload = onPopupFrameLoad;
    }
    window.frames["popupFrame"].document.location.href = url;
    gReturnFunc = returnFunc;
    // for IE
    if (gIsIE) {
        window.setTimeout("onPopupFrameLoadForIE();", 100);
    }
}

function onPopupFrameLoadForIE() {
    if (window.frames["popupFrame"].document.readyState != 'complete') {
        window.setTimeout("onPopupFrameLoadForIE();", 10);
    } else {
        onPopupFrameLoad();
    }
}

//
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();
        // scLeft and scTop changes by Thomas Risberg
        var scLeft,scTop;
        if (self.pageYOffset) {
            scLeft = self.pageXOffset;
            scTop = self.pageYOffset;
        } else if (document.documentElement && document.documentElement.scrollTop) {
            scLeft = document.documentElement.scrollLeft;
            scTop = document.documentElement.scrollTop;
        } else if (document.body) {
            scLeft = document.body.scrollLeft;
            scTop = document.body.scrollTop;
        } 
        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);
        var topMargin = scTop + ((fullHeight - (height+titleBarHeight)) / 2);
        if (topMargin < 0) { topMargin = 0; }
        gPopupContainer.style.top = topMargin + "px";
        gPopupContainer.style.left =  (scLeft + ((fullWidth - width) / 2)) + "px";
    }
}
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();
    gPopupBody.className = gPopupBody.className.replace(/\s*popupShown/, '');
    if (gPopupMask == null) {
        return;
    }
    if (callReturnFunc == true && gReturnFunc != null) {
        gReturnFunc(window.frames["popupFrame"].returnVal);
    }
}

/**
 * Sets the popup title based on the title of the html document it contains.
 * Also adds a base attribute so links and forms will jump out out of the iframe
 * unless a base or target is already explicitly set.
 * Uses a timeout to keep checking until the title is valid.
 */
function onPopupFrameLoad() {
    var popupDocument = window.frames["popupFrame"].document;
    document.getElementById("popupTitle").innerHTML = popupDocument.title;
    if (!gUseFrameBase && popupDocument.getElementsByTagName('base').length < 1) {
        var aList  = window.frames["popupFrame"].document.getElementsByTagName('a');
        for (var i = 0; i < aList.length; i++) {
            if (aList.target == null) aList[i].target='_parent';
        }
        var fList  = window.frames["popupFrame"].document.getElementsByTagName('form');
        for (i = 0; i < fList.length; i++) {
            if (fList.target == null) fList[i].target='_parent';
        }
    }
    if (gAutoHeight) {
        var h = parseInt(popupDocument.body.offsetHeight, 10) + 20;
        var mh = getViewportHeight() - 60;
        if (h > mh) h = mh;
        gPopFrame.style.height = h + 'px';
        centerPopWin(null, h);
    }
    gPopupLoading.style.display = 'none';
    var inputs = popupDocument.getElementsByTagName('input');
    if (inputs.length > 0)
        inputs[0].focus();
}

// 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++;
            }
        }
    }
}

/**
 * X-browser event handler attachment and detachment
 * @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; 
}

function showPopWin2(url, width, height, returnFunc) {
    var wnd = (window.top && window.top.showPopWin) ?
    window.top : window;
    if (width == null || isNaN(width)) {
    width = wnd.getViewportWidth() * 65 / 100;
    }
    if (height == null) {
    height = wnd.getViewportHeight() * 30 / 100;
    }

    return wnd.showPopWin(url, width, height, returnFunc);
}