var css    = "empty";

// IE 6
	if(navigator.appName == "Microsoft Internet Explorer" && navigator.userAgent.indexOf("MSIE 6.0") != -1 && navigator.userAgent.indexOf("Opera") == -1)	{
		css = "ie6.css";
	}	

// IE 7
	if(navigator.appName == "Microsoft Internet Explorer" && navigator.userAgent.indexOf("MSIE 7.0") != -1 && navigator.userAgent.indexOf("Opera") == -1)	{
		css = "ie7.css";
	}
	
// Opera
	if(navigator.userAgent.indexOf("Opera") != -1)	{
		css = "opera.css";
	}	

// IE 8
	if(navigator.appName == "Microsoft Internet Explorer" && navigator.userAgent.indexOf("MSIE 8.0") != -1 && navigator.userAgent.indexOf("Opera") == -1)	{
		css = "ie7.css";
	}
	
// CSS einbinden
	if (css.indexOf("empty") == -1) {
		document.write("<link rel=\"STYLESHEET\" type=\"text/css\" href=\"/fileadmin/css/"+css+"\">");
	}