function lighten(theId)
{
	if (theId == 'nav_about')
		document.getElementById('nav_about').style.backgroundImage = 'url(images/nav_about_on.gif)';	
	if (theId == 'nav_alternative')
		document.getElementById('nav_alternative').style.backgroundImage = 'url(images/nav_alternative_on.gif)';
	if (theId == 'nav_engineering')
		document.getElementById('nav_engineering').style.backgroundImage = 'url(images/nav_engineering_on.gif)';
	if (theId == 'nav_service')
		document.getElementById('nav_service').style.backgroundImage = 'url(images/nav_service_on.gif)';	
	if (theId == 'nav_option')
		document.getElementById('nav_option').style.backgroundImage = 'url(images/nav_option_on.gif)';	
	if (theId == 'nav_contact')
		document.getElementById('nav_contact').style.backgroundImage = 'url(images/nav_contact_on.gif)';		
}

function darken(theId)
{
	if (theId == 'nav_about')
		document.getElementById(theId).style.backgroundImage = "url(images/aboutBg.gif)";	
	if (theId == 'nav_alternative')
	{
		document.getElementById(theId).style.backgroundImage = "url(images/navBg.gif)";
		document.getElementById(theId).style.backgroundRepeat = "repeat-x";
		document.getElementById(theId).style.width= "158px";
	}	
	if (theId == 'nav_engineering')
	{
		document.getElementById(theId).style.backgroundImage = "url(images/navBg.gif)";
		document.getElementById(theId).style.backgroundRepeat = "repeat-x";
		document.getElementById(theId).style.width= "159px";
	}	
	if (theId == 'nav_service')
	{
		document.getElementById(theId).style.backgroundImage = "url(images/navBg.gif)";
		document.getElementById(theId).style.backgroundRepeat = "repeat-x";
		document.getElementById(theId).style.width= "125px";
	}
	if (theId == 'nav_option')
	{
		document.getElementById(theId).style.backgroundImage = "url(images/navBg.gif)";
		document.getElementById(theId).style.backgroundRepeat = "repeat-x";
		document.getElementById(theId).style.width= "50px";
	}		
}

function MM_openBrWindow(theURL,winName,features)
{ 
	window.open(theURL,winName,features);
}