/**
 * Based on... 
 *
 * SUBMODAL v1.5
 * Used for displaying DHTML only popups instead of using buggy modal windows.
 *
 * By Seth Banks
 * 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.
 *
 * .... Cnanges made to not use an iframe
 */
 /**
 * 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 addWindowEvent(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;
 }
}
 
// Popup code
var gPopupMask = null;
var gPopupContainer = null;
var gContainerDivTag = null;
var gTitleBarDivTag = null;
var gReturnFunc;
var gPopupIsShown = false;
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() 
{
	theBody = document.getElementsByTagName('BODY')[0];
	popmask = document.createElement('div');
	popmask.id = 'dialogMask';
	popmask.className = 'dialogMask';
	theBody.appendChild(popmask);
	gPopupMask = document.getElementById("dialogMask");
	
	// 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;
	}
}
addWindowEvent(window, "load", initPopUp);

 /**
	* @argument width - int in pixels
	* @argument height - int in pixels
	* @argument returnFunc - function to call when returning true from the window.
	* @argument showCloseBox - show the close box - default true
	*/

function showModalDialog(containerDivTag, titleBarDivTag, width, height, returnFunc) 
{
	gContainerDivTag = containerDivTag;
	gTitleBarDivTag = titleBarDivTag;
	gPopupContainer = document.getElementById(containerDivTag);
	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;
	if(titleBarDivTag != null)
	{
		titleBarHeight = parseInt(document.getElementById(titleBarDivTag).offsetHeight, 10);
	}

	gPopupContainer.style.width = width + "px";
	gPopupContainer.style.height = (height+titleBarHeight) + "px";
	
	gReturnFunc = returnFunc;
	// for IE
	if (gHideSelects == true) 
	{
		hideSelectBoxes();
	}
}

function centerPopWin(width, height) 
{
	if (gPopupIsShown == true) 
	{
		if (width == null || isNaN(width)) 
		{
			width = gPopupContainer.offsetWidth;
		}
		if (height == null) 
		{
			height = gPopupContainer.offsetHeight;
		}
		
		var theBody = document.getElementsByTagName("BODY")[0];
		var scTop = parseInt(getScrollTop(),10);
		var scLeft = parseInt(theBody.scrollLeft,10);
	
		setMaskSize();
		
		var titleBarHeight = 0;
		if(gTitleBarDivTag != null)
		{
			titleBarHeight = parseInt(document.getElementById(gTitleBarDivTag).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";
	}
}
addWindowEvent(window, "resize", centerPopWin);
addWindowEvent(window, "scroll", 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 hideModalDialog(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 = 0;
		window.setTimeout('gReturnFunc(gReturnVal);', 1);
	}
	// display all select boxes
	if (gHideSelects == true) 
	{
		displaySelectBoxes();
	}
	gPopupContainer = null;
	gContainerDivTag = null;
	gTitleBarDivTag = null;
}

// 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") 
			{
				if(document.forms[i].elements[e].name != "medicalServicesSelect") // to unhide Medical services select box
				{
					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";
			}
		}
	}
}