//menu buttons
var homeOn = new Image();
var homeOff = new Image();

var contactOn = new Image();
var contactOff = new Image();

var mriOn = new Image();
var mriOff = new Image();

var petOn = new Image();
var petOff = new Image();

var catOn = new Image();
var catOff = new Image();

var dentalOn = new Image();
var dentalOff = new Image();

var ultraOn = new Image();
var ultraOff = new Image();

var xrayOn = new Image();
var xrayOff = new Image();

var boneOn = new Image();
var boneOff = new Image();

var locationOn = new Image();
var locationOff = new Image();

var servicesOn = new Image();
var servicesOff = new Image();

var staffOn = new Image();
var staffOff = new Image();

var patientsOn = new Image();
var patientsOff = new Image();

var doctorsOn = new Image();
var doctorsOff = new Image();

var schedulingOn = new Image();
var schedulingOff = new Image();

var exam_prepOn = new Image();
var exam_prepOff = new Image();

var insuranceOn = new Image();
var insuranceOff = new Image();

//menu buttons source
homeOn.src="art/topnav_home_on.gif";
homeOff.src="art/topnav_home.gif";

contactOn.src="art/topnav_contact_on.gif";
contactOff.src="art/topnav_contact.gif";

mriOn.src="art/topnav_mri_on.gif";
mriOff.src="art/topnav_mri.gif";

petOn.src="art/topnav_pet_on.gif";
petOff.src="art/topnav_pet.gif";

catOn.src="art/topnav_cat_on.gif";
catOff.src="art/topnav_cat.gif";

dentalOn.src="art/topnav_dental_on.gif";
dentalOff.src="art/topnav_dental.gif";

ultraOn.src="art/topnav_ultra_on.gif";
ultraOff.src="art/topnav_ultra.gif";

xrayOn.src="art/topnav_xray_on.gif";
xrayOff.src="art/topnav_xray.gif";

boneOn.src="art/topnav_bone_on.gif";
boneOff.src="art/topnav_bone.gif";

locationOn.src="art/nav_location_on.gif";
locationOff.src="art/nav_location.gif";

servicesOn.src="art/nav_services_on.gif";
servicesOff.src="art/nav_services.gif";

staffOn.src="art/nav_staff_on.gif";
staffOff.src="art/nav_staff.gif";

patientsOn.src="art/nav_patients_on.gif";
patientsOff.src="art/nav_patients.gif";

doctorsOn.src="art/nav_doctors_on.gif";
doctorsOff.src="art/nav_doctors.gif";

schedulingOn.src="art/nav_scheduling_on.gif";
schedulingOff.src="art/nav_scheduling.gif";

exam_prepOn.src="art/nav_exam_prep_on.gif";
exam_prepOff.src="art/nav_exam_prep.gif";

insuranceOn.src="art/nav_insurance_on.gif";
insuranceOff.src="art/nav_insurance.gif";

// Change RollOver
function menuRollOn(imgname){ //use this for mouseover on images NOT on layers
		if (document.all){
			eval('document.images.'+imgname+'.src='+imgname+'On.src');
		} else if (document.layers) {
			eval('document.'+imgname+'.src='+imgname+'On.src');
		} else if (document.getElementById&&!document.all) {
			eval('document.getElementById("'+imgname+'").src='+imgname+'On.src');
			//eval('document.'+imgname+'.src='+imgname+'On.src');
		}		
}

// Revert to Default Image
function menuRollOff(imgname) { //use this for mouseout on images NOT on layers
		if (document.all) {
			eval('document.images.'+imgname+'.src='+imgname+'Off.src');
		} else if (document.layers) {
			eval('document.'+imgname+'.src='+imgname+'Off.src');
		} else if (document.getElementById&&!document.all) {
			// doesn't work -- eval('document.'+imgname+'.setAttribute("src","'+imgname+'Off.src")');
			eval('document.getElementById("'+imgname+'").src='+imgname+'Off.src');
		}	  
}