function addEvent(element, eventtype, fn, userCapture)
{

    if (element.addEventListener)		// DOM-compliant browser
    {
        element.addEventListener(eventtype, fn, userCapture);
        return true;
    }
    else
    if (element.attachEvent)		// Internet Explorer
    {
        var result = element.attachEvent('on' + eventtype, fn);
        return result;
    }
    else
        element['on' + eventtype] = fn;	// old fashioned browser

}

function failSilently()
{
//  Don't do anything - just fall over
}

function init()
{
    window.onError = failSilently;
    
    if (!document.getElementById) return;	// we really are in trouble!!

    homebutton = document.getElementById('tophome');    
    therapiesbutton = document.getElementById('toptherapies');
    treatsbutton = document.getElementById('toptreats');
    pricesbutton = document.getElementById('topprices');
    aboutmebutton = document.getElementById('topaboutme');
    therapiesul = document.getElementById('therapies');   
    aboutmeul = document.getElementById('aboutme');
        
    
    addEvent(homebutton, 'mouseover', function() {therapiesul.style.visibility='hidden'; aboutmeul.style.visibility='hidden';}, false);
    addEvent(therapiesbutton, 'mouseover', function() {therapiesul.style.visibility='visible'; aboutmeul.style.visibility='hidden';}, false);
    addEvent(treatsbutton, 'mouseover', function() {therapiesul.style.visibility='hidden'; aboutmeul.style.visibility='hidden';}, false);
    addEvent(pricesbutton, 'mouseover', function() {therapiesul.style.visibility='hidden'; aboutmeul.style.visibility='hidden';}, false);
    addEvent(aboutmebutton, 'mouseover', function() {therapiesul.style.visibility='hidden';aboutmeul.style.visibility='visible';}, false);

}
    


var homebutton;
var therapiesbutton;
var treatsbutton;
var pricesbutton;
var aboutmebutton;
var therapiesul;
var aboutmeul;

addEvent(window, 'load', init, false);