// top navigation image objects
theDoctorsOn = new Image();
theDoctorsOn.src = 'images/nav/the_doctors_over.gif';
theDoctorsOff = new Image();
theDoctorsOff.src = 'images/nav/the_doctors.gif';

corporateClientsOn = new Image();
corporateClientsOn.src = 'images/nav/corporate_clients_over.gif';
corporateClientsOff = new Image();
corporateClientsOff.src = 'images/nav/corporate_clients.gif';

privatePatientsOn = new Image();
privatePatientsOn.src = 'images/nav/private_patients_over.gif';
privatePatientsOff = new Image();
privatePatientsOff.src = 'images/nav/private_patients.gif';

greenRoomOn = new Image();
greenRoomOn.src = 'images/nav/green_room_over.gif';
greenRoomOff = new Image();
greenRoomOff.src = 'images/nav/green_room.gif';

locatnOn = new Image();
locatnOn.src = 'images/nav/location_over.gif';
locatnOff = new Image();
locatnOff.src = 'images/nav/location.gif';

faqOn = new Image();
faqOn.src = 'images/nav/faq_over.gif';
faqOff = new Image();
faqOff.src = 'images/nav/faq.gif';

practicePoliciesOn = new Image();
practicePoliciesOn.src = 'images/nav/practice_policies_over.gif';
practicePoliciesOff = new Image();
practicePoliciesOff.src = 'images/nav/practice_policies.gif';

ourPerspectiveOn = new Image();
ourPerspectiveOn.src = 'images/nav/our_perspective_over.gif';
ourPerspectiveOff = new Image();
ourPerspectiveOff.src = 'images/nav/our_perspective.gif';

function swapImage(imgSrc, imgHook) {
	
	eval('document.'+imgHook+'.src = "'+imgSrc.src+'"');
}

function visById(elementId) 
{
	if (eval("document.getElementById('"+elementId+"').style.display == 'none'") == true) {

		eval("document.getElementById('"+elementId+"').style.display = 'block'");
		eval("document.getElementById('"+elementId+"').style.visibility = 'visible'");
	} else {

		eval("document.getElementById('"+elementId+"').style.display = 'none'");
		eval("document.getElementById('"+elementId+"').style.visibility = 'hidden'");
	}
}