var detect = navigator.userAgent.toLowerCase();
var OS,browser,version,total,thestring;

if (checkIt('konqueror'))
{
	browser = "Konqueror";
	OS = "Linux";
}
else if (checkIt('safari')) browser = "Safari"
else if (checkIt('omniweb')) browser = "OmniWeb"
else if (checkIt('opera')) browser = "Opera"
else if (checkIt('webtv')) browser = "WebTV";
else if (checkIt('icab')) browser = "iCab"
else if (checkIt('msie')) browser = "Internet Explorer"
else if (!checkIt('compatible'))
{
	browser = "Netscape Navigator"
	version = detect.charAt(8);
}
else browser = "An unknown browser";

if (!version) version = detect.charAt(place + thestring.length);

if (!OS)
{
	if (checkIt('linux')) OS = "Linux";
	else if (checkIt('x11')) OS = "Unix";
	else if (checkIt('mac')) OS = "Mac"
	else if (checkIt('win')) OS = "Windows"
	else OS = "an unknown operating system";
}

function checkIt(string)
{
	place = detect.indexOf(string) + 1;
	thestring = string;
	return place;
}


// getBrowserWidth is taken from The Man in Blue Resolution Dependent Layout Script
// http://www.themaninblue.com/experiment/ResolutionLayout/
	function getBrowserWidth(){
		if (window.innerWidth){
			return window.innerWidth;}	
		else if (document.documentElement && document.documentElement.clientWidth != 0){
			return document.documentElement.clientWidth;	}
		else if (document.body){
			return document.body.clientWidth;}
		else {
			return 0;}
	}

// dynamicLayout by Kevin Hale
function dynamicLayout(){
	var browserWidth = getBrowserWidth();

	//Load Thin CSS Rules
	if (browserWidth < 900){
		if (browser == "Internet Explorer"){
			changeLayout("thin_ie");
		}
		else {
			changeLayout("thin");
		}
	}
	//Load Wide CSS Rules
	if (browserWidth >= 900){
		//alert(browserWidth);
		if (browser == "Internet Explorer"){
			changeLayout("wide_ie");
		}
		else {
			changeLayout("wide");
		}

	}
}

// changeLayout is based on setActiveStyleSheet function by Paul Sowdon 
// http://www.alistapart.com/articles/alternate/
function changeLayout(description){
   var i, a;
   for(i=0; (a = document.getElementsByTagName("link")[i]); i++){
	   if(a.getAttribute("title") == description){a.disabled = false;}
	   else if(a.getAttribute("title") != "default"){a.disabled = true;}
   }
}

	//addEvent() by John Resig
	function addEvent( obj, type, fn ){ 
	   if (obj.addEventListener){ 
	      obj.addEventListener( type, fn, false );
	   }
	   else if (obj.attachEvent){ 
	      obj["e"+type+fn] = fn; 
	      obj[type+fn] = function(){ obj["e"+type+fn]( window.event ); } 
	      obj.attachEvent( "on"+type, obj[type+fn] ); 
	   } 
	} 
	
	//Run dynamicLayout function when page loads and when it resizes.
	addEvent(window, 'load', dynamicLayout);
	addEvent(window, 'resize', dynamicLayout);