////////////////////////////////////////////////////////////////////////////////////

var browser = navigator.appName;
var ua = navigator.userAgent; 
var isMac = ua.indexOf("Macintosh") > -1;
	 
	function itsNetscape6() {
	  document.write('<LINK REL=StyleSheet HREF="/style_ns6.css" TYPE="text/css">');
	  window.onbeforeunload = resetNavImages;
	}	
	function itsNetscape() {
	  document.write('<LINK REL=StyleSheet HREF="/style_ns4.css" TYPE="text/css">');
	}	
	function itsMacNS4() {
	  document.write('<LINK REL=StyleSheet HREF="/style_mac.css" TYPE="text/css">');
	}	
	function itsMsie() {
	  document.write('<LINK REL=StyleSheet HREF="/style.css" TYPE="text/css">');
	}	
	if ((browser == "Netscape") && (parseInt(navigator.appVersion) >= 5)) {itsNetscape6()}
		else if (isMac && (parseInt(navigator.appVersion) == 4)) {itsMacNS4()}
		else if (browser == "Netscape") {itsNetscape()}
		else {itsMsie()}
		
////////////////////////////////////////////////////////////////////////////////////

////////////////////////////////////////////////////////////////////////////////////

var pathOfImg = "/images/";
if (document.images)	{ 
	function buttonOn(imgName) {
	    document.images[imgName].src= pathOfImg + imgName + "_on.gif"
	}
	  
	function buttonOff(imgName) {
	    document.images[imgName].src= pathOfImg + imgName + ".gif"
	}
	
}
////////////////////////////////////////////////////////////////////////////////////


function resetNavImages() {
	
		var navImages = new Array('hcfcd','about','prog-proj','learning','maps','faqs','downloads','link','news-media');
	
		for (i = 0; i < navImages.length; i++)
		{
			document.images[navImages[i]].src= pathOfImg + navImages[i] + ".gif";
		}
		return;

	}