// Detect if browser is Netscape 3 + or IE 4 +
	bName = navigator.appName;
	bVer = parseInt(navigator.appVersion);
    if ((bName == "Netscape" && bVer >= 3) || 
        (bName == "Microsoft Internet Explorer" && bVer >= 4)) br = "n3"; 
    else br = "n2";

    if (br== "n3") { 
	
				
		top_nav01_off	 		= new Image();
		top_nav01_off.src		= "images/nav/top_nav01_off.gif";
		top_nav01_on     		= new Image();
		top_nav01_on.src 		= "images/nav/top_nav01_on.gif";		
				
		top_nav02_off	 		= new Image();
		top_nav02_off.src		= "images/nav/top_nav02_off.gif";
		top_nav02_on     		= new Image();
		top_nav02_on.src 		= "images/nav/top_nav02_on.gif";		
		
		top_nav03_off	 		= new Image();
		top_nav03_off.src		= "images/nav/top_nav03_off.gif";
		top_nav03_on     		= new Image();
		top_nav03_on.src 		= "images/nav/top_nav03_on.gif";		
		
		top_nav04_off	 		= new Image();
		top_nav04_off.src		= "images/nav/top_nav04_off.gif";
		top_nav04_on     		= new Image();
		top_nav04_on.src 		= "images/nav/top_nav04_on.gif";		
		
		top_nav05_off	 		= new Image();
		top_nav05_off.src		= "images/nav/top_nav05_off.gif";
		top_nav05_on     		= new Image();
		top_nav05_on.src 		= "images/nav/top_nav05_on.gif";		
		
		top_nav06_off	 		= new Image();
		top_nav06_off.src		= "images/nav/top_nav06_off.gif";
		top_nav06_on     		= new Image();
		top_nav06_on.src 		= "images/nav/top_nav06_on.gif";	
		
		top_nav07_off	 		= new Image();
		top_nav07_off.src		= "images/nav/top_nav07_off.gif";
		top_nav07_on     		= new Image();
		top_nav07_on.src 		= "images/nav/top_nav07_on.gif";	
	
		
	}
		
	function imgOn(imgName){
		if (br == "n3"){
    	document[imgName].src = eval(imgName + "_on.src");		
		}
	}
	function imgOff(imgName) {
    	if (br == "n3") {
		document[imgName].src = eval(imgName + "_off.src");		
		}
	}