function popopen(e) {
    if (document.getElementById(e).style.display == 'none') {
        document.getElementById(e).style.display = 'block';
    } else {
        document.getElementById(e).style.display = 'none';
    }
}



function patientpop() {
    document.getElementById('patientsopen').style.display = 'block';
	document.getElementById('conditionsopen').style.display = 'none';
	document.getElementById('treatmentopen').style.display = 'none';
	document.getElementById('practiceopen').style.display = 'none';
    }


function treatmentpop() {
	document.getElementById('conditionsopen').style.display = 'none';
    document.getElementById('patientsopen').style.display = 'none';
	document.getElementById('practiceopen').style.display = 'none';
	document.getElementById('treatmentopen').style.display = 'block';
    }


function practicepop() {
    document.getElementById('patientsopen').style.display = 'none';
	document.getElementById('practiceopen').style.display = 'block';
	document.getElementById('treatmentopen').style.display = 'none';
	document.getElementById('conditionsopen').style.display = 'none';
    }

function conditionspop() {
    document.getElementById('patientsopen').style.display = 'none';
	document.getElementById('practiceopen').style.display = 'none';
	document.getElementById('treatmentopen').style.display = 'none';
	document.getElementById('conditionsopen').style.display = 'block';
    }


function hideall() {
        var Nodes = document.getElementsByTagName('span')
        var max = Nodes.length
        for(var i = 0;i < max;i++) {
                var nodeObj = Nodes.item(i)
                nodeObj.style.display = 'none';
        }
}

function newImage(arg) {
if (document.images) {
rslt = new Image();
rslt.src = arg;
return rslt;
}
}

function changeImages() {
if (document.images && (preloadFlag == true)) {
for (var i=0; i<changeImages.arguments.length; i+=2) {
document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
}
}
}

var preloadFlag = false;
function preloadImages() {
if (document.images) {
homebutton_over = newImage("graphics/homebutton-over.png");
about_over = newImage("graphics/about-over.png");
practice_over = newImage("graphics/practice-over.png");
patient_over = newImage("graphics/patient-over.png");
conditions_over = newImage("graphics/conditions-over.png");
treatement_over = newImage("graphics/treatement-over.png");
contact_over = newImage("graphics/contact-over.png");
preloadFlag = true;
}
}