//
// Displays tab content for tab_item
//
function show_banner(tab_item)
{	
	if (tab_item == "residential")
	{
		$('residential_link').style.backgroundImage="url(/images/banners/button_residential_there.gif)"; 
		$('commercial_link').style.backgroundImage="url(/images/banners/button_commercial.gif)"; 
		$('service_link').style.backgroundImage="url(/images/banners/button_service.gif)"; 
	}
	else if (tab_item == "commercial")
	{
		$('residential_link').style.backgroundImage="url(/images/banners/button_residential.gif)"; 
		$('commercial_link').style.backgroundImage="url(/images/banners/button_commercial_there.gif)"; 
		$('service_link').style.backgroundImage="url(/images/banners/button_service.gif)"; 
	}
	else 
	{
		$('residential_link').style.backgroundImage="url(/images/banners/button_residential.gif)"; 
		$('commercial_link').style.backgroundImage="url(/images/banners/button_commercial.gif)"; 
		$('service_link').style.backgroundImage="url(/images/banners/button_service_there.gif)"; 
	}
	
	$('banner_link').style.backgroundImage="url(/images/banners/"+tab_item+".jpg)"; 
	$('banner_link').href = "../"+tab_item+"/";
}