//will return the browser, Opera, Netscape, Internet Explorer
function getBrowser(){
	var objBrowser = navigator.appName + navigator.appVersion + navigator.userAgent;

	switch (navigator.appName){
		case "Netscape":
			if (objBrowser.indexOf("Opera 5", 0) != -1)					{return "OP5"}
			else if (objBrowser.indexOf("Netscape4", 0) != -1)			{return "NN4"}
			else if (objBrowser.indexOf("Netscape6", 0) != -1)			{return "NN6"}
			//else														{return "NN"} //unknown version of nn
			break;					
	
		case "Microsoft Internet Explorer":
			if (objBrowser.indexOf("Opera 5", 0) != -1)					{return "OP5"} 
			else if (objBrowser.indexOf("MSIE 5", 0) != -1)				{return "IE5"} 
			else if (objBrowser.indexOf("MSIE 6", 0) != -1)				{return "IE6"}
			//else														{return "IE"} //unknown version of ie
			break;
	
		case "Opera":
			if (objBrowser.indexOf("Opera/5",0) !=-1)					{return "OP5"}
			break;
	
		//case "Mozilla":
		//break;
		
		default: return "OTHER";
	}
}

//Will return the platform for the computer. Either MAC or WIN
function getPlatform() {
	var objPlatform = navigator.platform;
	//alert(objPlatform);
	
	if (objPlatform.indexOf("Mac", 0) != -1)			{return "MAC"}
	else if (objPlatform.indexOf("Win", 0) != -1)		{return "WIN"}
	
}

function getScreenRes() {
	var intScreenWidth = screen.width
	
	return intScreenWidth;
}



function getCss() {
	var objBrowserPlatform = getPlatform() + getBrowser();
	var intScreenWidth = getScreenRes();
	
	switch (objBrowserPlatform){
		case "WINOP5":		document.write('<link href="css/ie5.css" rel="styleSheet" type="text/css">'); break;
		case "WINNN4":		document.write('<LINK HREF="css/nn4.css" REL="styleSheet" TYPE="text/css">'); break;
		case "WINNN6":		document.write('<LINK HREF="css/nn6.css" REL="styleSheet" TYPE="text/css">'); break;
		case "WINIE5":		document.write('<link href="css/ie5.css" rel="styleSheet" type="text/css">'); break;
		case "WINIE6":		document.write('<link href="css/ie5.css" rel="styleSheet" type="text/css">'); break;
		
		case "MACOP5":		document.write('<LINK HREF="css/macie5.css" REL="styleSheet" TYPE="text/css">'); break;
		case "MACNN4":		document.write('<LINK HREF="css/macnn4.css" REL="styleSheet" TYPE="text/css">'); break;
		case "MACNN6":		document.write('<LINK HREF="css/macnn6.css" REL="styleSheet" TYPE="text/css">'); break;
		case "MACIE5":		document.write('<LINK HREF="css/macie5.css" REL="styleSheet" TYPE="text/css">'); break;
		case "MACIE6":		document.write('<LINK HREF="css/macie5.css" REL="styleSheet" TYPE="text/css">'); break;

		//will be used for other browser platform combinations
		case "OTHER":		document.write('<link href="css/ie.css" rel="styleSheet" type="text/css">');
	}

	
	//alert(objBrowserPlatform);
}


getCss();



<!-- //Netscape Resize Fix -->
<!--
function MM_reloadPage(init) {  
	//reloads the window if Nav4 resized
	if (init==true) with (navigator) {
		if ((appName=="Netscape")&&(parseInt(appVersion)==4)) {
			document.MM_pgW=innerWidth; 
			document.MM_pgH=innerHeight; 
			onresize=MM_reloadPage; 
		}
	}
	else if (innerWidth!=document.MM_pgW || innerHeight!=document.MM_pgH) 
		location.reload();
}

MM_reloadPage(true);
// -->