/**
* SUBMODAL v1.6
* Used for displaying DHTML only popups instead of using buggy modal windows.
*
* By Subimage LLC
* http://www.subimage.com
*
* Contributions by:
* 	Eric Angel - tab index code
* 	Scott - hiding/showing selects for IE users
*	Todd Huss - inserting modal dynamically and anchor classes
*
* Up to date code can be found at http://submodal.googlecode.com
*/

// Popup code
var gPopupMask = null;
var gPopupContainer = null;
var gPopFrame = null;
var gReturnFunc;
var gPopupIsShown = false;
var gDefaultPage = "/loading.html";
var gHideSelects = false;
var gReturnVal = 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() {
    // Add the HTML to the body
    theBody = document.getElementsByTagName('BODY')[0];
    popmask = document.createElement('div');
    popmask.id = 'popupMask';
    popcont = document.createElement('div');
    popcont.id = 'popupContainer';
    popcont.innerHTML = '' +
		'<div id="popupInner">' +
			'<div id="popupTitleBar">' +
				'<div id="popupTitle"></div>' +
				'<div id="popupControls">' +
					'<img src="images/close.gif" onclick="hidePopWin(false);" id="popCloseBox" />' +
				'</div>' +
			'</div>' +
			'<iframe src="' + gDefaultPage + '" style="width:100%;height:100%;background-color:transparent;" scrolling="auto" frameborder="0" allowtransparency="true" id="popupFrame" name="popupFrame" width="100%" height="100%"></iframe>' +
		'</div>';
    theBody.appendChild(popmask);
    theBody.appendChild(popcont);

    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;
    }

    // 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) {
            // var onclick = 'function (){showPopWin(\''+elms[i].href+'\','+width+', '+height+', null);return false;};';
            // elms[i].onclick = eval(onclick);
            elms[i].onclick = function() {
                // default width and height
                var width = 400;
                var height = 200;
                // Parse out optional width and height from className
                params = this.className.split('-');
                if (params.length == 3) {
                    width = parseInt(params[1]);
                    height = parseInt(params[2]);
                }
                showPopWin(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.
* @argument showCloseBox - show the close box - default true
*/
function showPopWin(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";
    }
    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";

    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("popupTitleBar").offsetWidth, 10) + "px";
    gPopFrame.style.height = (height) + "px";

    // set the url
    gPopFrame.src = url;

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

    window.setTimeout("setPopTitle();", 600);
}

//
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 theBody = document.documentElement;
        var theBody = document.getElementsByTagName("BODY")[0];
        //theBody.style.overflow = "hidden";
        var scTop = parseInt(getScrollTop(), 10);
        var scLeft = parseInt(theBody.scrollLeft, 10);

        setMaskSize();

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

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

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

        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;


/**
* Sets the size of the popup 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;
    }

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

/**
* @argument callReturnFunc - bool - determines if we call the return function specified
* @argument returnVal - anything - return value 
*/
function hidePopWin(callReturnFunc) {
    gPopupIsShown = false;
    var theBody = document.getElementsByTagName("BODY")[0];
    theBody.style.overflow = "";
    restoreTabIndexes();
    if (gPopupMask == null) {
        return;
    }
    gPopupMask.style.display = "none";
    gPopupContainer.style.display = "none";
    if (callReturnFunc == true && gReturnFunc != null) {
        // Set the return code to run in a timeout.
        // Was having issues using with an Ajax.Request();
        gReturnVal = window.frames["popupFrame"].returnVal;
        window.setTimeout('gReturnFunc(gReturnVal);', 1);
    }
    gPopFrame.src = gDefaultPage;
    // display all select boxes
    if (gHideSelects == true) {
        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() {
    return;
    if (window.frames["popupFrame"].document.title == null) {
        window.setTimeout("setPopTitle();", 10);
    } 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() {
    var x = document.getElementsByTagName("SELECT");

    for (i = 0; x && i < x.length; i++) {
        x[i].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 wanting select form tags to always be the 
* topmost z-index or layer.
*/
function displaySelectBoxes() {
    var x = document.getElementsByTagName("SELECT");

    for (i = 0; x && i < x.length; i++) {
        x[i].style.visibility = "visible";
    }
}