buttonindexoff = new Image();
buttonindexoff.src = 'images/index_off.gif';
buttonindexon = new Image();
buttonindexon.src = 'images/index_on.gif';

buttonwebsitesoff = new Image();
buttonwebsitesoff.src = 'images/websites_off.gif';
buttonwebsiteson = new Image();
buttonwebsiteson.src = 'images/websites_on.gif';

buttongraphicsoff = new Image();
buttongraphicsoff.src = 'images/graphics_off.gif';
buttongraphicson = new Image();
buttongraphicson.src = 'images/graphics_on.gif';

buttonhostingoff = new Image();
buttonhostingoff.src = 'images/hosting_off.gif';
buttonhostingon = new Image();
buttonhostingon.src = 'images/hosting_on.gif';

buttonwritingoff = new Image();
buttonwritingoff.src = 'images/writing_off.gif';
buttonwritingon = new Image();
buttonwritingon.src = 'images/writing_on.gif';

buttonbackgroundoff = new Image();
buttonbackgroundoff.src = 'images/background_off.gif';
buttonbackgroundon = new Image();
buttonbackgroundon.src = 'images/background_on.gif';

buttonindependentoff = new Image();
buttonindependentoff.src = 'images/independent_off.gif';
buttonindependenton = new Image();
buttonindependenton.src = 'images/independent_on.gif';

buttonpricesoff = new Image();
buttonpricesoff.src = 'images/prices_off.gif';
buttonpriceson = new Image();
buttonpriceson.src = 'images/prices_on.gif';

buttoncontactoff = new Image();
buttoncontactoff.src = 'images/contact_off.gif';
buttoncontacton = new Image();
buttoncontacton.src = 'images/contact_on.gif';

function On(ImageName)
{ document[ImageName].src = eval(ImageName+"on.src");
}
function Off(ImageName)
{ document[ImageName].src = eval(ImageName+"off.src");
}