if (document.images) {
	servicesoff = new Image();
	servicesoff.src = "/img/nav/services_off.gif";
	physiciansoff = new Image();
	physiciansoff.src = "/img/nav/physicians_off.gif";
	patientoff = new Image();
	patientoff.src = "/img/nav/patient_off.gif";
	faqsoff = new Image();
	faqsoff.src = "/img/nav/faqs_off.gif";
	insuranceoff = new Image();
	insuranceoff.src = "/img/nav/insurance_off.gif";
	linksoff = new Image();
	linksoff.src = "/img/nav/links_off.gif";
	aboutoff = new Image();
	aboutoff.src = "/img/nav/about_off.gif";

    serviceson = new Image();
	serviceson.src = "/img/nav/services_on.gif";
    physicianson = new Image();
	physicianson.src = "/img/nav/physicians_on.gif";
    patienton = new Image();
	patienton.src = "/img/nav/patient_on.gif";
    faqson = new Image();
	faqson.src = "/img/nav/faqs_on.gif";
    insuranceon = new Image();
	insuranceon.src = "/img/nav/insurance_on.gif";
    linkson = new Image();
	linkson.src = "/img/nav/links_on.gif";
    abouton = new Image();
	abouton.src = "/img/nav/about_on.gif";
                                                
}

// Function to 'activate' images.

function imgOn(imgName) {
	if (document.images) {
		document[imgName].src = eval(imgName + "on.src");
	}
}

// Function to 'deactivate' images.

function imgOff(imgName) {
	if (document.images) {
		document[imgName].src = eval(imgName + "off.src");
	}
}

// Function to create dynamic pop up window, currently set to center window on screen.

function newWindow(url, wid, hgt, scr, res, x, y) {
    if (screen) {
        widthOfScreen = screen.width
        heightOfScreen = screen.height
    }
    midX = widthOfScreen / 2
    midY = heightOfScreen / 2
    midWid = wid / 2
    midHgt = hgt / 2
    x = midX - midWid
    y = midY - midHgt
    popUpWindow = window.open(url, 'popUp', 'width='+wid+',height='+hgt+',scrollbars='+scr+',resizable='+res+',left='+x+',top='+y+'')
}