/**
 * 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.
 */


/**
 * COMMON DHTML FUNCTIONS
 * These are handy functions I use all the time.
 *
 * By Seth Banks (webmaster at subimage dot com)
 * http://www.subimage.com/
 *
 * Up to date code can be found at http://www.subimage.com/dhtml/
 *
 * 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
    // removed scrolling attribute from iframe tag below on 1/25/11 and set #popupFrame in submodal.css to overflow:auto - now scrolling bar only appears when its needed - Rex
	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="/include-mt/subModal-dialog/close.gif" onclick="hidePopWin(false);" id="popCloseBox" />' +
				'</div>' +
			'</div>' +
			'<iframe src="/include-mt/subModal-dialog/preload.html" style="width:100%;height:100%;background-color:transparent;" 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 = 250;
				// 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();", 800);
}	// showPopWin


//
//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);
//alert("scrollTop: " + scTop + "\nscrollLeft: " + scLeft);

		gPopupMask.style.top = scTop + "px";
		gPopupMask.style.left = scLeft + "px";
	
		setMaskSize();
		
		//window.status = gPopupMask.style.top + " " + gPopupMask.style.left + " " + gi++;
		
		var titleBarHeight = parseInt(document.getElementById("popupTitleBar").offsetHeight, 10);

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

		// Need to re-fetch the scroll position - the above code usually returns 0,0 for top,left.
		// This code will get the real scroll offset.
		var arrXY = getScrollXY();
		scLeft = arrXY[0];
		scTop = arrXY[1];

//alert("doc body scrollTop: " + document.body.scrollTop);
//alert("doc body clientHeight: " + document.body.clientHeight);
//alert("doc body offsetHeight: " + document.body.offsetHeight);
//alert("doc body scrollHeight: " + document.body.scrollHeight);

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

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";
}	// setMaskSize


/**
 * @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) {
		gReturnFunc(window.frames["popupFrame"].returnVal);
	}
//	gPopFrame.src = '/include-mt/subModal-dialog/preload.html';
	// display all select boxes
	if (gHideSelects == true) {
		displaySelectBoxes();
	}
}	// hidePopWin


/**
 * 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.setTimeout("setPopTitle();", 100);
	} 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";
			}
		}
	}
}


function getScrollXY() {
  var scrOfX = 0, scrOfY = 0;
  if( typeof( window.pageYOffset ) == 'number' ) {
    //Netscape compliant
    scrOfY = window.pageYOffset;
    scrOfX = window.pageXOffset;
  } else if( document.body && ( document.body.scrollLeft || document.body.scrollTop ) ) {
    //DOM compliant
    scrOfY = document.body.scrollTop;
    scrOfX = document.body.scrollLeft;
  } else if( document.documentElement && ( document.documentElement.scrollLeft || document.documentElement.scrollTop ) ) {
    //IE6 standards compliant mode
    scrOfY = document.documentElement.scrollTop;
    scrOfX = document.documentElement.scrollLeft;
  }
  return [ scrOfX, scrOfY ];
}