/**
 * 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.
 */

// Popup code
var gPopupMask = null;
var gPopupContainer = null;
//var gPopupBehindFrame= null;
var gPopFrame = null;
var gReturnFunc;
var gPopupIsShown = false;
var gHideSelects = true;
var gAttempts= 0;

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;
} // end if

/**
 * Initializes popup code on load.	
 */
function InitPopUp() {	
	
	// 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;
	} // end if
	
} // end function

function AssignVariables() {
  gPopupMask = document.getElementById("popupMask");
	gPopupContainer = document.getElementById("popupContainer");
	//gPopupBehindFrame= document.getElementById("popupBehindFrame");	
	gPopFrame = document.getElementById("popupFrame");	
} // end function

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) {  
  AssignVariables();
	gPopupIsShown = true;
	DisableTabIndexes();	
	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";
		
	// set the url
	gPopFrame.src = url;
	
	gReturnFunc = returnFunc;
	// for IE		
	
	//gPopupBehindFrame.style.display= "block";
	gPopupMask.style.display = "block";
	
	if (gHideSelects == true) {
		HideSelectBoxes();
	} // end if
	
	window.setTimeout("SetPopTitle();", 300);
	
} // end function

//
var gi = 0;

function CenterPopWin(width, height) {

	if(gPopupIsShown == true) {
	
		if(width == null || isNaN(width)) {
			width = gPopupContainer.offsetWidth;
		} // end if
		
		if (height == null) {
			height = gPopupContainer.offsetHeight;
		} // end if
		
		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";
						
	} // end if
	
} // end function

AddEvent(window, "resize", 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;
	} // end if
	
	gPopupMask.style.display = "none"; 	
	gPopupContainer.style.display = "none";
	
	if (callReturnFunc == true && gReturnFunc != null) {
		gReturnFunc(window.frames["popupFrame"].returnVal);
	} // end if
		
	if (gHideSelects == true) {
		DisplaySelectBoxes();
	} // end if
	
} // end function

/**
 * 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 == "" && (gAttempts < 100)) {	  
		window.setTimeout("SetPopTitle();", 1000);
		gAttempts++;
	} // end if
	
	else {
	  gAttempts= 0;
		document.getElementById("popupTitle").innerHTML = window.frames["popupFrame"].document.title;
	} // end else
	
} // end function

// 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;
    
} // end function

// 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++;
			} // end for
		} // end for
		
	} // end if
	
} // end function

// 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++;
			} // end for
		} // end for
		
	} // end if
	
} // end function