// Browser Detect  v2.1.6
// documentation: http://www.dithered.com/javascript/browser_detect/index.html
// license: http://creativecommons.org/licenses/by/1.0/
// code by Chris Nott (chris[at]dithered[dot]com)


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

   // browser engine name
   this.isGecko       = (ua.indexOf('gecko') != -1 && ua.indexOf('safari') == -1);
   this.isAppleWebKit = (ua.indexOf('applewebkit') != -1);

   // browser name
   this.isKonqueror   = (ua.indexOf('konqueror') != -1); 
   this.isSafari      = (ua.indexOf('safari') != - 1);
   this.isOmniweb     = (ua.indexOf('omniweb') != - 1);
   this.isOpera       = (ua.indexOf('opera') != -1); 
   this.isIcab        = (ua.indexOf('icab') != -1); 
   this.isAol         = (ua.indexOf('aol') != -1); 
   this.isIE          = (ua.indexOf('msie') != -1 && !this.isOpera && (ua.indexOf('webtv') == -1) ); 
   this.isMozilla     = (this.isGecko && ua.indexOf('gecko/') + 14 == ua.length);
   this.isFirebird    = (ua.indexOf('firebird/') != -1);
   this.isNS          = ( (this.isGecko) ? (ua.indexOf('netscape') != -1) : ( (ua.indexOf('mozilla') != -1) && !this.isOpera && !this.isSafari && (ua.indexOf('spoofer') == -1) && (ua.indexOf('compatible') == -1) && (ua.indexOf('webtv') == -1) && (ua.indexOf('hotjava') == -1) ) );
   
   // spoofing and compatible browsers
   this.isIECompatible = ( (ua.indexOf('msie') != -1) && !this.isIE);
   this.isNSCompatible = ( (ua.indexOf('mozilla') != -1) && !this.isNS && !this.isMozilla);
   
   // rendering engine versions
   this.geckoVersion = ( (this.isGecko) ? ua.substring( (ua.lastIndexOf('gecko/') + 6), (ua.lastIndexOf('gecko/') + 14) ) : -1 );
   this.equivalentMozilla = ( (this.isGecko) ? parseFloat( ua.substring( ua.indexOf('rv:') + 3 ) ) : -1 );
   this.appleWebKitVersion = ( (this.isAppleWebKit) ? parseFloat( ua.substring( ua.indexOf('applewebkit/') + 12) ) : -1 );
   
   // browser version
   this.versionMinor = parseFloat(navigator.appVersion); 
   
   // correct version number
   if (this.isGecko && !this.isMozilla) {
      this.versionMinor = parseFloat( ua.substring( ua.indexOf('/', ua.indexOf('gecko/') + 6) + 1 ) );
   }
   else if (this.isMozilla) {
      this.versionMinor = parseFloat( ua.substring( ua.indexOf('rv:') + 3 ) );
   }
   else if (this.isIE && this.versionMinor >= 4) {
      this.versionMinor = parseFloat( ua.substring( ua.indexOf('msie ') + 5 ) );
   }
   else if (this.isKonqueror) {
      this.versionMinor = parseFloat( ua.substring( ua.indexOf('konqueror/') + 10 ) );
   }
   else if (this.isSafari) {
      this.versionMinor = parseFloat( ua.substring( ua.lastIndexOf('safari/') + 7 ) );
   }
   else if (this.isOmniweb) {
      this.versionMinor = parseFloat( ua.substring( ua.lastIndexOf('omniweb/') + 8 ) );
   }
   else if (this.isOpera) {
      this.versionMinor = parseFloat( ua.substring( ua.indexOf('opera') + 6 ) );
   }
   else if (this.isIcab) {
      this.versionMinor = parseFloat( ua.substring( ua.indexOf('icab') + 5 ) );
   }
   
   this.versionMajor = parseInt(this.versionMinor); 
   
   // 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 BrowserDetect();

// END BrowserDetect script.

function fixheight() {
	var maxH = 0;
	var ids = ["page-content","page-leftnav"];
	// find the highest column
	for (var i=0;i<ids.length;i++) {
		var d = document.getElementById(ids[i]);
		if (d.offsetHeight > maxH) maxH = d.offsetHeight;
	}
	// set them all to be that height
	for (var i=0;i<ids.length;i++) {
		var d=document.getElementById(ids[i]);
		d.style.height = maxH+"px";
	}
}

// FIX for MS and Opera which take border width to be included
// in the object width - other browsers do not!
function fixwidth() { 
	if (browser.isIE || browser.isOpera)
		document.body.style.width = "750px";
}

var switchDivOn = true;
var switchDivFrom;
var switchDivTo;
function switchDiv(fromId, toId) {
	
	if (!switchDivOn)
		return false;
	
	switchDivFrom = document.getElementById(fromId);
	switchDivTo = document.getElementById(toId);
	
	
	var toDivHtml = switchDivTo.innerHTML;
		
	switchDivTo.innerHTML = switchDivFrom.innerHTML;
	switchDivFrom.innerHTML = toDivHtml;
	
	return true;
}

function switchBack() {
	if (switchDivFrom != null && switchDivTo != null) {
		var toDivHtml = switchDivTo.innerHTML;
		switchDivTo.innerHTML = switchDivFrom.innerHTML;
		switchDivFrom.innerHTML = toDivHtml;
		return true;
	} else {
		return false;	
	}
}

function getElement(elementId) {
	var element = document.getElementById(elementId);

	return element;	
}


// Returns the HTML contained within HTML element named in divId
function getHTML(divId) {
	var element = document.getElementById(divId);
	return element.innerHTML;	
}

function menuSelect() {
	var menudiv = document.getElementById('page-leftnav');
	var anchors = menudiv.getElementsByTagName('a');
	for (var count=0; count<anchors.length; count++) {
		if (anchors[count].href == document.location.href) {
			anchors[count].className="selected";
			break;
		}
	}
}

function playSound(sound) {

	var url = "http://romani.humanities.manchester.ac.uk/db/"+sound;

	var autosound = document.getElementById('autosound');
	var pageContent = document.getElementById('page-content');
	if (autosound)
		pageContent.removeChild(autosound);

	var newautosound = document.createElement('iframe');
	newautosound.setAttribute('src', url);
	newautosound.style.width='0px';
	newautosound.style.height='0px';
	newautosound.style.visibility = 'hidden';
	
	pageContent.appendChild(newautosound);
	
};

//function playSound(surl) {
//	sndWin(surl);
////  document.getElementById("soundspan").innerHTML="<embed src='"+surl+"' hidden='true' autostart='true' loop='false'>";
//}

//function sndWin (url) {
//	url = "http://romani.humanities.manchester.ac.uk/db/"+url;
// var win = window.open(url, "sound", "width=50,height=50,top=100,left=100,resizable=new,scrollbars=1");
//  win.focus();
//}

// All the code that MUST be executed when the page loads.
window.onload = function() {
	// execute cludge to fix nav and content heights.
	fixheight();
	// execute cludge to fix width for IE and Opera.
	fixwidth();
	//select menu option for loaded page
	menuSelect();
}