function about_mouseover()
	{
	rollover1.src = "images/internal-over_04.gif"; 
	}
function about_mouseout()
	{
	rollover1.src = "images/internal_04.gif";  
	}
function services_mouseover()
	{
	rollover2.src = "images/internal-over_06.gif"; 
	}
function services_mouseout()
	{
	rollover2.src = "images/internal_06.gif";  
	}
function developments_mouseover()
	{
	rollover3.src = "images/internal-over_08.gif"; 
	}
function developments_mouseout()
	{
	rollover3.src = "images/internal_08.gif";  
	}
function contact_mouseover()
	{
	rollover4.src = "images/internal-over_10.gif"; 
	}
function contact_mouseout()
	{
	rollover4.src = "images/internal_10.gif";  
	}