//browse sniffer and loader of stylesheet & nav system
if (document.layers) {
	//Netscape 4
		document.write("<link rel='stylesheet' type='text/css' href='/ahl_ns4.css'>");
	//Render the DHTML stylesheet
		document.write("<link rel='stylesheet' type='text/css' href='/ahl_dhtml.css'>");
} else if(document.all) {
	//IE
	document.write("<link rel='stylesheet' type='text/css' href='/ahl.css'>");
	//Render the DHTML stylesheet
		document.write("<link rel='stylesheet' type='text/css' href='/ahl_dhtml.css'>");
} else if(document.getElementById) {
	//Netscape 6
	document.write("<link rel='stylesheet' type='text/css' href='/ahl_ns.css'>");
	//Render the DHTML stylesheet
		document.write("<link rel='stylesheet' type='text/css' href='/ahl_dhtml.css'>");
} else {
	//Older than 4.0 browser
}

//Generic rollover script
function leftnavroll(state, whichnav) {
	if (state==0) eval(whichnav).src = "/images/nav/" + whichnav + ".gif";
	if (state==1) eval(whichnav).src = "/images/nav/" + whichnav + "_on.gif";
}

//Finally, preload the navigation images
if (document.images) {
  nav01 = new Image(134,20); 
  nav01.src=""; 
}