function openMenu(id) {
	
	if(id=='vinhome') {
		document.getElementById(id).style.backgroundImage = 'url(img/vinculum_home_rollover.png)';	
	}
	if(id=='vinabout') {
		document.getElementById(id).style.backgroundImage = 'url(img/vinculum_about_us_rollover.png)';	
	}
	if(id=='vinproduct') {
		document.getElementById(id).style.backgroundImage = 'url(img/vinculum_products_rollover.png)';	
	}
	if(id=='vinservice') {
		document.getElementById(id).style.backgroundImage = 'url(img/vinculum_services_rollover.png)';	
	}
	if(id=='vinpartner') {
		document.getElementById(id).style.backgroundImage = 'url(img/vinculum_partners_rollover.png)';	
	}
}

function closeMenu(id) {
	if(id=='vinhome') {
		document.getElementById(id).style.backgroundImage = 'url(img/vinculum_home.png)';	
	}
	if(id=='vinabout') {
		document.getElementById(id).style.backgroundImage = 'url(img/vinculum_about_us.png)';	
	}
	if(id=='vinproduct') {
		document.getElementById(id).style.backgroundImage = 'url(img/vinculum_products.png)';	
	}
	if(id=='vinservice') {
		document.getElementById(id).style.backgroundImage = 'url(img/vinculum_services.png)';	
	}
	if(id=='vinpartner') {
		document.getElementById(id).style.backgroundImage = 'url(img/vinculum_partners.png)';	
	}
}