if (document.images)
    {
      home_off=new Image();
      home_on=new Image();
      editorial_off=new Image();
      editorial_on=new Image();
      advertising_off=new Image();
      advertising_on=new Image();
      subscriptions_off=new Image();
      subscriptions_on=new Image();
      productguide_off=new Image();
      productguide_on=new Image();
      showcase_off=new Image();
      showcase_on=new Image();
      
      vacuum_off=new Image();
      vacuum_on=new Image();
      research_off=new Image();
      research_on=new Image();
      oem_off=new Image();
      oem_on=new Image();
      consulting_off=new Image();
      consulting_on=new Image();
      
      

      home_off.src="images2/nav_home_off.gif";
      home_on.src="images2/nav_home_on.gif";
      editorial_off.src="images2/nav_editorial_off.gif";
      editorial_on.src="images2/nav_editorial_on.gif";
      advertising_off.src="images2/nav_adv_off.gif";
      advertising_on.src="images2/nav_adv_on.gif";
      subscriptions_off.src="images2/nav_search_off.gif";
      subscriptions_on.src="images2/nav_search_on.gif";
      productguide_off.src="images2/nav_buyers_off.gif";
      productguide_on.src="images2/nav_buyers_on.gif";
      showcase_off.src="images2/nav_prodshow_off.gif";
      showcase_on.src="images2/nav_prodshow_on.gif";
      
      vacuum_off.src="images/sidenav_vacuum_off.gif";
      vacuum_on.src="images/sidenav_vacuum_on.gif";
      research_off.src="images/sidenav_research_off.gif";
      research_on.src="images/sidenav_research_on.gif";
      oem_off.src="images/sidenav_oem_off.gif";
      oem_on.src="images/sidenav_oem_on.gif";
      consulting_off.src="images/sidenav_consulting_off.gif";
      consulting_on.src="images/sidenav_consulting_on.gif";
      
    }
    
if ((navigator.appVersion.charAt(0) == "4") && (navigator.appName == "Netscape"))
	browser = "netscape4";

if ((navigator.appVersion.charAt(0) >= "5") && (navigator.appName == "Netscape"))
	browser = "dom_compatible";

if ((navigator.appVersion.charAt(0) >= "4") && (navigator.appName == "Microsoft Internet Explorer"))
	{
		if (navigator.platform != "MacPPC")
			browser = "dom_compatible";
			
		if (navigator.platform == "MacPPC")
			{
				if (navigator.appVersion.substring(17,25) == "MSIE 4.5")
					browser = "other";
				if (navigator.appVersion.substring(17,25) == "MSIE 5.0")
					browser = "dom_compatible";
			}
	}
	
if (navigator.appVersion.charAt(0) < "4")
	browser = "other";

function Display(layername) {

	if (layername == 'editorial_layer') {
	
		document.editorial.src=editorial_on.src;
	
		if (browser == "dom_compatible") {
			document.getElementById("editorial_layer").style.visibility='visible';
		}

		else if (browser == "netscape4") {
			document.layers[layername].visibility='show';
		}
	}
	
	else if (layername == 'advertising_layer') {
	
		document.advertising.src=advertising_on.src;

		if (browser == "dom_compatible") {
			document.getElementById("advertising_layer").style.visibility='visible';
		}

		else if (browser == "netscape4") {
			document.layers[layername].visibility='show';
		}
	}
	
	else if (layername == 'subscriptions_layer') {
	
		document.subscriptions.src=subscriptions_on.src;

		if (browser == "dom_compatible") {
			document.getElementById("subscriptions_layer").style.visibility='visible';
		}

		else if (browser == "netscape4") {
			document.layers[layername].visibility='show';
		}
	}

	else if (layername == 'productguide_layer') {
	
		document.productguide.src=productguide_on.src;

		if (browser == "dom_compatible") {
			document.getElementById("productguide_layer").style.visibility='visible';
		}

		else if (browser == "netscape4") {
			document.layers[layername].visibility='show';
		}
	}

	else if (layername == 'showcase_layer') {
	
		document.showcase.src=showcase_on.src;

		if (browser == "dom_compatible") {
			document.getElementById("showcase_layer").style.visibility='visible';
		}

		else if (browser == "netscape4") {
			document.layers[layername].visibility='show';
		}
	}
}

function Display2(layername) {

	if (layername == 'editorial_layer') {
	
		document.editorial.src=editorial_off.src;
		
		if (browser == "dom_compatible") {
			document.getElementById("editorial_layer").style.visibility='visible';
		}

		else if (browser == "netscape4") {
			document.layers[layername].visibility='show';
		}
	}
	
	else if (layername == 'advertising_layer') {
	
		document.advertising.src=advertising_off.src;
		
		if (browser == "dom_compatible") {
			document.getElementById("advertising_layer").style.visibility='visible';
		}

		else if (browser == "netscape4") {
			document.layers[layername].visibility='show';
		}
	}
	
	else if (layername == 'subscriptions_layer') {
	
		document.subscriptions.src=subscriptions_off.src;
		
		if (browser == "dom_compatible") {
			document.getElementById("subscriptions_layer").style.visibility='visible';
		}

		else if (browser == "netscape4") {
			document.layers[layername].visibility='show';
		}
	}

	else if (layername == 'productguide_layer') {
	
		document.productguide.src=productguide_off.src;
		
		if (browser == "dom_compatible") {
			document.getElementById("productguide_layer").style.visibility='visible';
		}

		else if (browser == "netscape4") {
			document.layers[layername].visibility='show';
		}
	}

	else if (layername == 'showcase_layer') {
	
		document.showcase.src=showcase_off.src;
		
		if (browser == "dom_compatible") {
			document.getElementById("showcase_layer").style.visibility='visible';
		}

		else if (browser == "netscape4") {
			document.layers[layername].visibility='show';
		}
	}
}

function Hide(layername) {			

	if (layername == 'editorial_layer') {
	
		document.editorial.src=editorial_off.src;
		
		if (browser == "dom_compatible") {
			document.getElementById("editorial_layer").style.visibility='hidden';
		}
						
		else if (browser == "netscape4") {
			document.layers[layername].visibility='hide';
		}
	}
	
	else if (layername == 'advertising_layer') {
	
		document.advertising.src=advertising_off.src;

		if (browser == "dom_compatible") {
			document.getElementById("advertising_layer").style.visibility='hidden';
		}

		else if (browser == "netscape4") {
			document.layers[layername].visibility='hide';
		}
	}
	
	else if (layername == 'subscriptions_layer') {
	
		document.subscriptions.src=subscriptions_off.src;

		if (browser == "dom_compatible") {
			document.getElementById("subscriptions_layer").style.visibility='hidden';
		}

		else if (browser == "netscape4") {
			document.layers[layername].visibility='hide';
		}
	}

	else if (layername == 'productguide_layer') {
	
		document.productguide.src=productguide_off.src;

		if (browser == "dom_compatible") {
			document.getElementById("productguide_layer").style.visibility='hidden';
		}

		else if (browser == "netscape4") {
			document.layers[layername].visibility='hide';
		}
	}

	else if (layername == 'showcase_layer') {
	
		document.showcase.src=showcase_off.src;

		if (browser == "dom_compatible") {
			document.getElementById("showcase_layer").style.visibility='hidden';
		}

		else if (browser == "netscape4") {
			document.layers[layername].visibility='hide';
		}
	}
}


function ButtonDisplay(button) {	

	if (button == 'home') {
		document.home.src=home_on.src;
	}
	
	else if (button == 'vacuum') {
		document.vacuum.src=vacuum_on.src;
	}
	
	else if (button == 'research') {
		document.research.src=research_on.src;
	}
	
	else if (button == 'oem') {
		document.oem.src=oem_on.src;
	}
		
	else if (button == 'consulting') {
		document.consulting.src=consulting_on.src;
	}
}

function ButtonHide(button) {

	if (button == 'home') {
		document.home.src=home_off.src;
	}
	
	else if (button == 'vacuum') {
		document.vacuum.src=vacuum_off.src;
	}
	
	else if (button == 'research') {
		document.research.src=research_off.src;
	}
	
	else if (button == 'oem') {
		document.oem.src=oem_off.src;
	}

	else if (button == 'consulting') {
		document.consulting.src=consulting_off.src;
	}
}