var OS = navigator.userAgent;
	if ((OS.indexOf("MSIE 8.0")!=-1)) //check for Internet Explorer IE8
	{
	//media = all
	var fileref=document.createElement("link")
	fileref.setAttribute("rel", "stylesheet")
	fileref.setAttribute("type", "text/css")
	fileref.setAttribute("href", "css/ieStyleAll.css")
	fileref.setAttribute("media", "all")

	document.getElementsByTagName("head")[0].appendChild(fileref) //load ieStyleAll.css stylsheet for Internet Explorer IE8 browser
	
	//media = print
	var fileref=document.createElement("link")
	fileref.setAttribute("rel", "stylesheet")
	fileref.setAttribute("type", "text/css")
	fileref.setAttribute("href", "css/ieStylePrint.css")
	fileref.setAttribute("media", "print")

	document.getElementsByTagName("head")[0].appendChild(fileref) //load ieStylePrint.css stylsheet for Internet Explorer IE8 browser
	}
	
	else if ((OS.indexOf("MSIE 7.0")!=-1)) //check for Internet Explorer IE7
	{
	//media = all
	var fileref=document.createElement("link")
	fileref.setAttribute("rel", "stylesheet")
	fileref.setAttribute("type", "text/css")
	fileref.setAttribute("href", "css/ie7StyleAll.css")
	fileref.setAttribute("media", "all")

	document.getElementsByTagName("head")[0].appendChild(fileref) //load ieStyleAll.css stylsheet for Internet Explorer IE7 browser
	
	//media = print
	var fileref=document.createElement("link")
	fileref.setAttribute("rel", "stylesheet")
	fileref.setAttribute("type", "text/css")
	fileref.setAttribute("href", "css/ie7StylePrint.css")
	fileref.setAttribute("media", "print")

	document.getElementsByTagName("head")[0].appendChild(fileref) //load ieStylePrint.css stylsheet for Internet Explorer IE7 browser
	}
	
	else if ((OS.indexOf("AppleWebKit")!=-1)) //check for Apple's Safari browser running on Windows or Mac OSX
	{
	//media = screen
	var fileref=document.createElement("link")
	fileref.setAttribute("rel", "stylesheet")
	fileref.setAttribute("type", "text/css")
	fileref.setAttribute("href", "css/applekitscreen.css")
	fileref.setAttribute("media", "screen")

	document.getElementsByTagName("head")[0].appendChild(fileref) //load applekitscreen.css stylsheet for Win or Mac OSX/Safari browser
	
	//media = print
	var fileref=document.createElement("link")
	fileref.setAttribute("rel", "stylesheet")
	fileref.setAttribute("type", "text/css")
	fileref.setAttribute("href", "css/applekitprint.css")
	fileref.setAttribute("media", "print")

	document.getElementsByTagName("head")[0].appendChild(fileref) //load applekitprint.css stylsheet for Win or Mac OSX/Safari browser	
	
	}

	else if ((OS.indexOf("Windows NT 6.1")!=-1) && (OS.indexOf("Firefox")!=-1)) //check for Windows 7 OS running a Firefox browser
	{
	var fileref=document.createElement("link")
	fileref.setAttribute("rel", "stylesheet")
	fileref.setAttribute("type", "text/css")
	fileref.setAttribute("href", "css/win7fx3print.css")
	fileref.setAttribute("media", "print")

	document.getElementsByTagName("head")[0].appendChild(fileref) //load win7fx3print.css stylsheet for Win7 OS/Firefox browser
	}

	else if ((OS.indexOf("Windows NT 6.1")!=-1) && (OS.indexOf("MSIE 8.0")!=-1)) //check for Windows 7 OS running an IE8 browser
	{
	//media = screen
	var fileref=document.createElement("link")
	fileref.setAttribute("rel", "stylesheet")
	fileref.setAttribute("type", "text/css")
	fileref.setAttribute("href", "css/win7ie8screen.css")
	fileref.setAttribute("media", "screen")

	document.getElementsByTagName("head")[0].appendChild(fileref) //load win7ie8print.css stylsheet for Win7 OS/IE8 browser
	//media = print
	var fileref=document.createElement("link")
	fileref.setAttribute("rel", "stylesheet")
	fileref.setAttribute("type", "text/css")
	fileref.setAttribute("href", "css/win7ie8print.css")
	fileref.setAttribute("media", "print")

	document.getElementsByTagName("head")[0].appendChild(fileref) //load win7ie8print.css stylsheet for Win7 OS/IE8 browser
	}

	else if ((OS.indexOf("Mac OS X")!=-1) && (OS.indexOf("Firefox")!=-1)) //check for Mac OS X running a Firefox browser
	{
	//media = screen
	var fileref=document.createElement("link")
	fileref.setAttribute("rel", "stylesheet")
	fileref.setAttribute("type", "text/css")
	fileref.setAttribute("href", "css/OSXapplekitscreen.css")
	fileref.setAttribute("media", "screen")

	document.getElementsByTagName("head")[0].appendChild(fileref) //load OSXapplekitscreen.css stylsheet for Mac OSX/Firefox browser
	
	//media = print
	var fileref=document.createElement("link")
	fileref.setAttribute("rel", "stylesheet")
	fileref.setAttribute("type", "text/css")
	fileref.setAttribute("href", "css/OSXapplekitprint.css")
	fileref.setAttribute("media", "print")

	document.getElementsByTagName("head")[0].appendChild(fileref) //load OSXapplekitprint.css stylsheet for Mac OSX/Firefox browser	
	}