if (parseInt(navigator.appVersion.substring(0,1))>=3)
{
trac_on = new Image();
trac_off = new Image();
serv_on = new Image();
serv_off = new Image();
contac_on = new Image();
contac_off = new Image();
paci_on = new Image();
paci_off = new Image();

trac_off.src = 'menus/tractpsic.gif';
trac_on.src = 'menus/tractpsicpres.gif';
serv_off.src = 'menus/altres.gif';
serv_on.src = 'menus/altrespres.gif';
contac_off.src = 'menus/comcontact.gif';
contac_on.src = 'menus/comcontactpres.gif';
paci_off.src = 'menus/compacient.gif';
paci_on.src = 'menus/compacientpres.gif';
}

function on(image)
{
if (parseInt(navigator.appVersion.substring(0,1))>=3)
{
imagesrc = eval(image + '_on.src');
document[image].src = imagesrc;
}
}
function off(image)
{
if (parseInt(navigator.appVersion.substring(0,1))>=3)
{
imagesrc = eval(image + '_off.src');
document[image].src = imagesrc;
}
}