var blnReset = false;



function showtopnav(menuname)

{

	resettopnav();

	showLayer(menuname+'Menu');

	showLayer('topNavReset');

	blnReset = false;

}



function resettopnav()

{

	hideLayer('productsMenu');

	hideLayer('aboutMenu');

	hideLayer('newsMenu');

	hideLayer('employmentMenu');

	hideLayer('linksMenu');

	hideLayer('topNavReset');

	blnReset = false;

}



function settimedreset()

{

	blnReset = true;

	setTimeout('timedresetnav()', 800);

}



function timedresetnav()

{

	if(blnReset)

	{

		resettopnav();

	}

}



function showLayer(layerName)

{

	if(document.all) // IE

	{

		document.all[layerName].style.visibility = 'visible';

	}

	else if(document.layers) // NS

	{

 		document.layers[layerName].visibility = 'visible';

	}

	else // DOM

	{

		document.getElementById(layerName).style.visibility = 'visible';

	}

}



function hideLayer(layerName)

{

	if(document.all) // IE

	{

		document.all[layerName].style.visibility = 'hidden';

	}

	else if(document.layers) // NS

	{

		document.layers[layerName].visibility = 'hidden';

	}

	else // DOM

	{

		document.getElementById(layerName).style.visibility = 'hidden';

	}

}



function imgOn(imgName)

{

	if(document.images)

	{

		document[imgName].src = eval(imgName + "On.src");

	}

}



function imgOff(imgName)

{

	if(document.images){
		//alert(imgName + "Off.src");
		document[imgName].src = eval(imgName + "Off.src");
		
	}

}