function showDiv(id) 
{ 
	var i; 
	for(i=1;i<=3;i++) 
	{ 
		if(i==id) 
			document.getElementById('cnt'+i).style.visibility='visible'; 
		else 
			document.getElementById('cnt'+i).style.visibility='hidden'; 
	}
if(id == "1")
{
document.images["a1"].src='/portals/0/abtus1.jpg'
document.images["a2"].src='/portals/0/simplicity.jpg'
document.images["a3"].src='/portals/0/ourbilling.jpg'
document.images["a4"].src='/portals/0/index_home_06.jpg'
}
if(id == "2")
{
document.images["a2"].src='/portals/0/simplicity_Over.jpg'
document.images["a1"].src='/portals/0/abtus1.jpg'
document.images["a3"].src='/portals/0/ourbilling.jpg'
document.images["a4"].src='/portals/0/index_home_06.jpg'
}
if(id == "3")
{
document.images["a3"].src='/portals/0/ourbilling_Over.jpg'
document.images["a1"].src='/portals/0/abtus1.jpg'
document.images["a2"].src='/portals/0/simplicity.jpg'
document.images["a4"].src='/portals/0/index_home_06.jpg'
}
}