/**
 * This is a version of subModal 
 * Original By Seth Banks (webmaster at subimage dot com)  http://www.subimage.com/
 */

// Element Ids
var gPopupMaskId = "popupMask";
var gPopupContainerId = "popupContainer";
var gPopFrameId = "popupFrame";
var gPopupInnerId = "popupInner";

// Popup code
var gPopupMask = null;
var gPopupContainer = null;
var gPopFrame = null;
var gPopupIsShown = false;
var gHideSelects = false;

var gTabIndexes = new Array();
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() {
	gPopupMask = document.getElementById(gPopupMaskId);
	gPopupContainer = document.getElementById(gPopupContainerId);
	gPopFrame = document.getElementById(gPopFrameId);

	// check to see if this is IE version 6 or lower. Fixed in IE 7
	var brsVersion = parseInt(window.navigator.appVersion.charAt(0), 10);
	if (brsVersion <= 6 && window.navigator.userAgent.indexOf("MSIE") > -1) {
		gHideSelects = true;
	}
	
	var canShow = (( gPopupMask ) && ( gPopupContainer ) && ( gPopFrame ))
	if ( ( canShow ) && ( gHideSelects ) )
	{
	    // IE Specific.
	    canShow = ( gPopFrame.readyState.toLowerCase() != 'loading' );
	    if ( !canShow ){ gPopFrame.src = gPopFrame.src; }
	}	
	return (canShow);
}

 /**
	* @argument width - int in pixels
	* @argument height - int in pixels
	*/

function showPopWin(width, height) {

    if (!gPopupMask) return;
    if (!gPopupContainer) return;
	gPopupIsShown = true;
	disableTabIndexes();
	gPopupMask.style.display = "block";
	gPopupContainer.style.display = "block";
	centerPopWin(width, height);

	gPopupContainer.style.width = width + "px";
	gPopupContainer.style.height = height + "px";

    gPopFrame.style.width = parseInt(document.getElementById(gPopupInnerId).offsetWidth, 10) + "px";

	gPopFrame.style.height = (height) + "px";

	// for IE
	if (gHideSelects == true) { ShowSelectBoxes(false); }
}

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 fullHeight = getViewportHeight();
		var fullWidth = getViewportWidth();
		// scLeft and scTop changes by Thomas Risberg
		var scLeft,scTop;
		if (self.pageYOffset) {
			scLeft = self.pageXOffset;
			scTop = self.pageYOffset;
		} else if (document.documentElement && document.documentElement.scrollTop) {
			scLeft = document.documentElement.scrollLeft;
			scTop = document.documentElement.scrollTop;
		} else if (document.body) {
			scLeft = document.body.scrollLeft;
			scTop = document.body.scrollTop;
		} 
		
	    gPopupMask.style.height = fullHeight + "px";
	    gPopupMask.style.width = fullWidth + "px";
		    
		gPopupMask.style.top = scTop + "px";
		gPopupMask.style.left = scLeft + "px";
		
		gPopupContainer.style.top =  "100px";
		gPopupContainer.style.left =  (scLeft + ((fullWidth - width) / 2)) + "px";
	}
}
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;
	}
    // display all select boxes
	if (gHideSelects == true) { ShowSelectBoxes(true); }

	gPopupMask.style.display = "none";
	gPopupContainer.style.display = "none";
}

// 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++;
			}
		}
	}
}

function ShowSelectBoxes(visible) {
	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) ? "visible" : "hidden";
			}
		}
	}
}

/**
 * X-browser event handler attachment and detachment
 * @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;
 }
}

/**
 * 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; 
}