/**
 * SUBMODAL v1.4
 * 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
 *   Scott - hiding/showing selects for IE users
 *  Todd Huss - inserting modal dynamically and anchor classes
 *
 * 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.
 */

/**
 * 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;
 }
}
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 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 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="close.gif" onclick="hidePopWin(false);" id="popCloseBox" />' +
//        '</div>' +
//      '</div>' +
      '<iframe src="" scrolling="auto" frameborder="0" allowtransparency="true" id="popupFrame" name="popupFrame"></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 = 0; //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 = (width-4) + "px";   //parseInt(document.getElementById("popupTitleBar").offsetWidth, 10) + "px";
  gPopFrame.style.height = (height-4) + "px";  //(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(theBody.scrollTop,10);
    var scLeft = parseInt(theBody.scrollLeft,10);

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

    setMaskSize();

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

    var titleBarHeight = 0; //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.documentElement;
  //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) {
    gReturnFunc(window.frames["popupFrame"].returnVal);
  }
  gPopFrame.src = '';
  // 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() {
  for(var i = 0; i < document.forms.length; i++) {
    for(var e = 0; e < document.forms[i].length; e++){
      if(document.forms[i].elements[e].tagName == "SELECT") {
        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(document.forms[i].elements[e].tagName == "SELECT") {
      document.forms[i].elements[e].style.visibility="visible";
      }
    }
  }
}