/*******************
  Browser Detection
********************/

// Browser Detect Lite  v2.1.4
// http://www.dithered.com/javascript/browser_detect/index.html
// modified by Chris Nott (chris@NOSPAMdithered.com - remove NOSPAM)


function BrowserDetectLite() {
   var ua = navigator.userAgent.toLowerCase(); 

   // browser name
   this.isGecko     = (ua.indexOf('gecko') != -1 && ua.indexOf('safari') == -1);
   this.isMozilla   = (this.isGecko && ua.indexOf('gecko/') + 14 == ua.length);
   this.isNS        = ( (this.isGecko) ? (ua.indexOf('netscape') != -1) : ( (ua.indexOf('mozilla') != -1) && (ua.indexOf('spoofer') == -1) && (ua.indexOf('compatible') == -1) && (ua.indexOf('opera') == -1) && (ua.indexOf('webtv') == -1) && (ua.indexOf('hotjava') == -1) ) );
   this.isIE        = ( (ua.indexOf('msie') != -1) && (ua.indexOf('opera') == -1) && (ua.indexOf('webtv') == -1) ); 
   this.isSafari    = (ua.indexOf('safari') != - 1);
   this.isOpera     = (ua.indexOf('opera') != -1); 
   this.isKonqueror = (ua.indexOf('konqueror') != -1 && !this.isSafari); 
   this.isIcab      = (ua.indexOf('icab') != -1); 
   this.isAol       = (ua.indexOf('aol') != -1); 
   
   // spoofing and compatible browsers
   this.isIECompatible = ( (ua.indexOf('msie') != -1) && !this.isIE);
   this.isNSCompatible = ( (ua.indexOf('mozilla') != -1) && !this.isNS && !this.isMozilla);
   
   // browser version
   this.versionMinor = parseFloat(navigator.appVersion); 
   
   // correct version number
   if (this.isNS && this.isGecko) {
      this.versionMinor = parseFloat( ua.substring( ua.lastIndexOf('/') + 1 ) );
   }
   else if (this.isIE && this.versionMinor >= 4) {
      this.versionMinor = parseFloat( ua.substring( ua.indexOf('msie ') + 5 ) );
   }
   else if (this.isMozilla) {
      this.versionMinor = parseFloat( ua.substring( ua.indexOf('rv:') + 3 ) );
   }
   else if (this.isSafari) {
      this.versionMinor = parseFloat( ua.substring( ua.lastIndexOf('/') + 1 ) );
   }
   else if (this.isOpera) {
      if (ua.indexOf('opera/') != -1) {
         this.versionMinor = parseFloat( ua.substring( ua.indexOf('opera/') + 6 ) );
      }
      else {
         this.versionMinor = parseFloat( ua.substring( ua.indexOf('opera ') + 6 ) );
      }
   }
   else if (this.isKonqueror) {
      this.versionMinor = parseFloat( ua.substring( ua.indexOf('konqueror/') + 10 ) );
   }
   else if (this.isIcab) {
      if (ua.indexOf('icab/') != -1) {
         this.versionMinor = parseFloat( ua.substring( ua.indexOf('icab/') + 6 ) );
      }
      else {
         this.versionMinor = parseFloat( ua.substring( ua.indexOf('icab ') + 6 ) );
      }
   }
   
   this.versionMajor = parseInt(this.versionMinor); 
   this.geckoVersion = ( (this.isGecko) ? ua.substring( (ua.lastIndexOf('gecko/') + 6), (ua.lastIndexOf('gecko/') + 14) ) : -1 );
   
   // dom support
   this.isDOM1 = (document.getElementById);
   this.isDOM2Event = (document.addEventListener && document.removeEventListener);
   
   // css compatibility mode
   this.mode = document.compatMode ? document.compatMode : 'BackCompat';

   // platform
   this.isWin   = (ua.indexOf('win') != -1);
   this.isWin32 = (this.isWin && ( ua.indexOf('95') != -1 || ua.indexOf('98') != -1 || ua.indexOf('nt') != -1 || ua.indexOf('win32') != -1 || ua.indexOf('32bit') != -1 || ua.indexOf('xp') != -1) );
   this.isMac   = (ua.indexOf('mac') != -1);
   this.isUnix  = (ua.indexOf('unix') != -1 || ua.indexOf('sunos') != -1 || ua.indexOf('bsd') != -1 || ua.indexOf('x11') != -1)
   this.isLinux = (ua.indexOf('linux') != -1);
   
   // specific browser shortcuts
   this.isNS4x = (this.isNS && this.versionMajor == 4);
   this.isNS40x = (this.isNS4x && this.versionMinor < 4.5);
   this.isNS47x = (this.isNS4x && this.versionMinor >= 4.7);
   this.isNS4up = (this.isNS && this.versionMinor >= 4);
   this.isNS6x = (this.isNS && this.versionMajor == 6);
   this.isNS6up = (this.isNS && this.versionMajor >= 6);
   this.isNS7x = (this.isNS && this.versionMajor == 7);
   this.isNS7up = (this.isNS && this.versionMajor >= 7);
   
   this.isIE4x = (this.isIE && this.versionMajor == 4);
   this.isIE4up = (this.isIE && this.versionMajor >= 4);
   this.isIE5x = (this.isIE && this.versionMajor == 5);
   this.isIE55 = (this.isIE && this.versionMinor == 5.5);
   this.isIE5up = (this.isIE && this.versionMajor >= 5);
   this.isIE6x = (this.isIE && this.versionMajor == 6);
   this.isIE6up = (this.isIE && this.versionMajor >= 6);
   
   this.isIE4xMac = (this.isIE4x && this.isMac);
}
var browser = new BrowserDetectLite();

/**************************************************
 * dom-drag.js
 * 09.25.2001
 * www.youngpup.net
 **************************************************
 * 10.28.2001 - fixed minor bug where events
 * sometimes fired off the handle, not the root.
 **************************************************/

var Drag = {

	obj : null,

	init : function(o, oRoot, minX, maxX, minY, maxY, bSwapHorzRef, bSwapVertRef, fXMapper, fYMapper)
	{
		o.onmousedown	= Drag.start;

		o.hmode			= bSwapHorzRef ? false : true ;
		o.vmode			= bSwapVertRef ? false : true ;

		o.root = oRoot && oRoot != null ? oRoot : o ;

		if (o.hmode  && isNaN(parseInt(o.root.style.left  ))) o.root.style.left   = "0px";
		if (o.vmode  && isNaN(parseInt(o.root.style.top   ))) o.root.style.top    = "0px";
		if (!o.hmode && isNaN(parseInt(o.root.style.right ))) o.root.style.right  = "0px";
		if (!o.vmode && isNaN(parseInt(o.root.style.bottom))) o.root.style.bottom = "0px";

		o.minX	= typeof minX != 'undefined' ? minX : null;
		o.minY	= typeof minY != 'undefined' ? minY : null;
		o.maxX	= typeof maxX != 'undefined' ? maxX : null;
		o.maxY	= typeof maxY != 'undefined' ? maxY : null;

		o.xMapper = fXMapper ? fXMapper : null;
		o.yMapper = fYMapper ? fYMapper : null;

		o.root.onDragStart	= new Function();
		o.root.onDragEnd	= new Function();
		o.root.onDrag		= new Function();
	},

	start : function(e)
	{
		var o = Drag.obj = this;
		e = Drag.fixE(e);
		var y = parseInt(o.vmode ? o.root.style.top  : o.root.style.bottom);
		var x = parseInt(o.hmode ? o.root.style.left : o.root.style.right );
		o.root.onDragStart(x, y);

		o.lastMouseX	= e.clientX;
		o.lastMouseY	= e.clientY;

		if (o.hmode) {
			if (o.minX != null)	o.minMouseX	= e.clientX - x + o.minX;
			if (o.maxX != null)	o.maxMouseX	= o.minMouseX + o.maxX - o.minX;
		} else {
			if (o.minX != null) o.maxMouseX = -o.minX + e.clientX + x;
			if (o.maxX != null) o.minMouseX = -o.maxX + e.clientX + x;
		}

		if (o.vmode) {
			if (o.minY != null)	o.minMouseY	= e.clientY - y + o.minY;
			if (o.maxY != null)	o.maxMouseY	= o.minMouseY + o.maxY - o.minY;
		} else {
			if (o.minY != null) o.maxMouseY = -o.minY + e.clientY + y;
			if (o.maxY != null) o.minMouseY = -o.maxY + e.clientY + y;
		}

		document.onmousemove	= Drag.drag;
		document.onmouseup		= Drag.end;

		return false;
	},

	drag : function(e)
	{
		e = Drag.fixE(e);
		var o = Drag.obj;

		var ey	= e.clientY;
		var ex	= e.clientX;
		var y = parseInt(o.vmode ? o.root.style.top  : o.root.style.bottom);
		var x = parseInt(o.hmode ? o.root.style.left : o.root.style.right );
		var nx, ny;

		if (o.minX != null) ex = o.hmode ? Math.max(ex, o.minMouseX) : Math.min(ex, o.maxMouseX);
		if (o.maxX != null) ex = o.hmode ? Math.min(ex, o.maxMouseX) : Math.max(ex, o.minMouseX);
		if (o.minY != null) ey = o.vmode ? Math.max(ey, o.minMouseY) : Math.min(ey, o.maxMouseY);
		if (o.maxY != null) ey = o.vmode ? Math.min(ey, o.maxMouseY) : Math.max(ey, o.minMouseY);

		nx = x + ((ex - o.lastMouseX) * (o.hmode ? 1 : -1));
		ny = y + ((ey - o.lastMouseY) * (o.vmode ? 1 : -1));

		if (o.xMapper)		nx = o.xMapper(y)
		else if (o.yMapper)	ny = o.yMapper(x)

		Drag.obj.root.style[o.hmode ? "left" : "right"] = nx + "px";
		Drag.obj.root.style[o.vmode ? "top" : "bottom"] = ny + "px";
		Drag.obj.lastMouseX	= ex;
		Drag.obj.lastMouseY	= ey;

		Drag.obj.root.onDrag(nx, ny);
		return false;
	},

	end : function()
	{
		document.onmousemove = null;
		document.onmouseup   = null;
		Drag.obj.root.onDragEnd(	parseInt(Drag.obj.root.style[Drag.obj.hmode ? "left" : "right"]), 
									parseInt(Drag.obj.root.style[Drag.obj.vmode ? "top" : "bottom"]));
		Drag.obj = null;
	},

	fixE : function(e)
	{
		if (typeof e == 'undefined') e = window.event;
		if (typeof e.layerX == 'undefined') e.layerX = e.offsetX;
		if (typeof e.layerY == 'undefined') e.layerY = e.offsetY;
		return e;
	}
};


// browser detection variables
// uses dithered.com browserdetect_lite script
// http://www.dithered.com/javascript/browser_detect/index.html
var isIE55Up = (browser.isWin && browser.isIE && browser.versionMinor >= 5.5);
var isIE55Down = (browser.isWin && browser.isIE && browser.versionMinor < 5.5);
var spacerGif = '/images/gui/spacer.gif';

// recurse through linked and imported stylesheets
function fixPngBackgrounds() {
	if (isIE55Up) {
		walkStyleRules(applyAlphaLoader);
	}
	else if (isIE55Down) {
		walkStyleRules(substituteGif);
	}
}

function applyAlphaLoader(rule) {
	var sBgImage = rule.style.backgroundImage; // url(/path/to/image)
	if (sBgImage) {
		var imgSrc = sBgImage.substring(4,rule.style.backgroundImage.length-1);
		if ( imgSrc.match(/\.png$/i) ) {
			rule.style.backgroundImage = 'none';
			rule.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='" + imgSrc + "')";
		}
	}
}

function substituteGif(rule) {
	var sBgImage = rule.style.backgroundImage; // url(/path/to/image)
	if (sBgImage) {
		var imgSrc = sBgImage.substring(4,rule.style.backgroundImage.length-1);
		if ( imgSrc.match(/\.png$/i) ) {
			rule.style.backgroundImage = 'url(' + imgSrc.replace(/(.+)\.png$/i, "$1.gif") + ')';
		}
	}
}

// modified version of youngpup.net's "sleight" code snippet
function fixPngImages() {
	if (browser.isIE && browser.isWin && window.attachEvent) {
		window.attachEvent("onload", fnLoadPngs);
	}	
}

// call onload
function fnLoadPngs() {
	for (var i = document.images.length - 1, img = null; (img = document.images[i]); i--) {
		if (isIE55Up && img.src.match(/\.png$/i) != null) {
			var src = img.src;
			img.style.width = img.width + "px";
			img.style.height = img.height + "px";
			img.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='" + src + "', sizingMethod='scale')";
			img.src = spacerGif;
		}
	}
}

// recurse through linked and imported stylesheets, applying fn to each rule
function walkStyleRules(fn) {
	var sCol = (walkStyleRules.arguments[1]) ? walkStyleRules.arguments[1] : document.styleSheets;
	for (var i = 0; i < sCol.length; i++) {
		for (var j = 0; j < sCol[i].rules.length; j++) {
			fn(sCol[i].rules[j]);
		}
		if (sCol[i].imports.length > 0) {
			walkStyleRules(fn, sCol[i].imports);
		}
	}
}

fixPngBackgrounds();
fixPngImages();

/**************
  FAQ Windoids
***************/

var faqWin;
var faqUrl = '/handlers/faq.php';
var windoidHTML =
'<div id="windoid" style="left:100px;top:100px;visibility:hidden"> \
	<div id="windoidTop" ondblclick="windowShade()"> \
		<img src="/images/windoid/windoid_close.png" alt="" width="30" height="17" title="Click here to close" id="faqCloseBox" hspace="0" vspace="0" /> \
		<div id="windoidLabel" title="Double-click to collapse"><span>EnSky FAQ<\/span><\/div> \
		<img src="/images/windoid/windoid_right.png" alt="" width="32" height="17" hspace="0" vspace="0" /> \
	<\/div> \
	<div id="windoidBody"> \
		<div id="leftShadow"><img src="/images/windoid/shadowLeft.png" height="100" width="6" alt="" /><\/div> \
		<iframe width="160" height="100" id="faqFrame" name="faqFrame" frameborder="0"><\/iframe> \
		<div id="rightShadow"><img src="/images/windoid/shadowRight.png" height="100" width="9" alt="" /><\/div> \
	<\/div> \
	<div id="windoidBtm"> \
		<img src="/images/windoid/btmLeft.png" height="12" alt="" width="11" hspace="0" vspace="0" /><img src="/images/windoid/shadowBtm.png" height="12" alt="" width="150" hspace="0" vspace="0" /><img src="/images/windoid/btmRight.png" height="12" alt="" width="14" hspace="0" vspace="0" /> \
	<\/div> \
<\/div>';

function windoidIsSupported() {
	var isSupported = false;
	if ( (browser.isGecko) ||
	     (browser.isMac && browser.isIE5up) ||
	     (browser.isWin && browser.isIE && (browser.versionMinor >= 5.5)) ||
	     (browser.isOpera && (browser.versionMajor >= 7)) ||
	     (browser.isSafari) )
	   {
			isSupported = true;
	   }
	return isSupported;
}

function writeWindoid() {
	if ( windoidIsSupported() ) {
		document.write(windoidHTML);
	}
}

function openWindoid(trigger, id) {
	if ( windoidIsSupported() ) {
		var x = xbGetElementPageX(trigger) + 5;
		var y = xbGetElementPageY(trigger) + 15;
		var windoid = xbGetElementById('windoid');
		var frameRef = window.frames['faqFrame'];
		
		// close existing windoid
		if (windoid.isOpen) {
			closeWindoid();
		}
		
		// load faq into windoid
		frameRef.location.href = faqUrl + '?windoid=yes&id=' + id;
		
		// move windoid into place
		windoid.style.left = x + 'px';
		windoid.style.top = y + 'px';
		windoid.style.visibility = 'visible';
		
		// mark it as open
		windoid.isOpen = true;
	}
	else { // pop a window
		var uri = faqUrl + '?windoid=no&id=' + id;
		if (!faqWin || faqWin.closed) {
			faqWin = window.open(uri, 'faqWin', "height=200,width=300,status=no,toolbar=no,location=no,resize=yes");
		}
		else {
			faqWin.location.href = uri;
		}
		faqWin.focus();
	}
	return true;
}

function initWindoid() {
	if ( windoidIsSupported() ) {
		var theHandle = xbGetElementById("windoidTop");
		var theRoot   = xbGetElementById("windoid");
		var closeBox  = xbGetElementById("faqCloseBox");
		Drag.init(theHandle, theRoot); // uses DOM Drag library
		theRoot.onDragStart = disableTextSelection;
		theRoot.onDragEnd = enableTextSelection;
		closeBox.onclick = closeWindoid;
	}
}

function closeWindoid() {
	xbGetElementById('windoid').style.visibility = 'hidden';
}
	
function windowShade() {
	var bdy = xbGetElementById('windoidBody');
	if (bdy.collapsed) {
		bdy.style.display = 'block';
		bdy.collapsed = false;
	}
	else {
		bdy.style.display = 'none';
		bdy.collapsed = true;
	}
}

function disableTextSelection() {
	document.onselectstart = new Function('return false');
}

function enableTextSelection() {
	document.onselectstart = new Function('return true');
}

xbAddEventListener(window, 'load', initWindoid, false);


/********************************
  Search engine message logging
*********************************/
function semlog(evt) {
	var logUrl = '/handlers/semlogger.php';
	var img = new Image;
	var evt = (evt) ? evt : ((window.event) ? window.event : "");
	if (evt) {
		if (evt.target) {
            elem = (evt.target.nodeType == 3) ? evt.target.parentNode : evt.target
        } else {
            elem = evt.srcElement
        }
		var isLink = (typeof elem.href != 'undefined');
		var bailed = ('bail-link' == elem.id);
		if (isLink) {
			logUrl += '?id=' + semLogId + '&bailed=' + ((bailed) ? 1 : 0);
			img.src = logUrl;
		}
		// return user to search results if they bailed
		if (bailed) {
			history.go(-1)
			return false;
		}
		else {
			return true;
		}
	}
}

/***********************************
  Cross Browser DOM Functions
************************************/

/* cross-browser DOM functions */

function xbGetElementById(id) {
	var elm = null
	if (document.getElementById) {
		elm = document.getElementById(id)
	}
	else if (document.all) {
		elm = (document.all[id]) ? document.all[id] : null
	}
	else if (document.layers) {
		elm = document.layers[id] // punting on full NS 4 support for now
	}
	return elm
}

function xbGetElementPageX(elm) {
	var x = 0
	if (typeof elm.offsetLeft == 'number') {
		while (elm) {
		  x += elm.offsetLeft
		  elm = elm.offsetParent
		}
	}
	else if (document.layers) {
		x = elm.pageX // won't work for image objects
	}
	return x
}

function xbGetElementPageY(elm) {
	var y = 0
	if (typeof elm.offsetTop == 'number') {
		while (elm) {
		  y += elm.offsetTop
		  elm = elm.offsetParent
		}
	}
	else if (document.layers) {
		y = elm.pageY // won't work for image objects
	}
	return y
}

/* cross browser event listeners */

function xbAddEventListener(elm, evType, fn, useCapture) {
	if (elm.addEventListener) { // DOM
		elm.addEventListener(evType, fn, useCapture)
	}
	else if (elm.attachEvent) { // MSIE
		elm.attachEvent('on' + evType, fn)
	}
	else { // emulation
		if (typeof elm['_eventListeners'] == 'undefined') {
			elm['_eventListeners'] = {}
		}
		if (!elm['_eventListeners'][evType]) {
			elm['_eventListeners'][evType] = []
			curEvtHandler = elm['on' + evType]
			if (curEvtHandler) {
				elm['_eventListeners'][evType][0] = curEvtHandler // copy existing event handler
			}
			elm['on' + evType] = xbGenericEventHandler
		}
		elm['_eventListeners'][evType][elm['_eventListeners'][evType].length] = fn
	}
}

function xbGenericEventHandler(evt) {
	evt = (evt) ? evt : ((window.event) ? window.event : "")
	if (evt) {
		var ary = this['_eventListeners'][evt.type]
		for (var i = 0; i < ary.length; i++) {
			if (ary[i]) {
				ary[i]()
			}
		}
	}
}



function findChecked(buttonSet){
	for(i=0; i < buttonSet.length; i++){
		if(buttonSet[i].checked){
			return buttonSet[i].value
		}
	}
	return false
}

function popVid(movie, type, speed){
	var target = "/media/video/" + movie + "/" + type + "_" + speed + ".html"
	window.open(target, "movie", "width=330,height=250,scrollbars=no")
}

function launchVideo(movie){
	var frm = (document.layers) ? document.layers.columns.document.forms.vid : document.forms.vid
	type = findChecked(frm.type)
	speed = findChecked(frm.speed)
	popVid(movie, type, speed)
}