function search_on() { document.getElementById('butsearch').src = '/images/search-button-over.gif'; }
function search_off() { document.getElementById('butsearch').src = '/images/search-button.gif'; }
function submit_on() { document.getElementById('butsubmit').src='/images/submit-button-over.gif'; }
function submit_off() { document.getElementById('butsubmit').src='/images/submit-button.gif'; }
function go_on() { document.getElementById('butgo').src='/images/go-button-over.gif'; }
function go_off() { document.getElementById('butgo').src='/images/go-button.gif'; }
function viewdetails_on() { document.getElementById('butviewdetails').src='/images/viewdetails-button-over.gif'; }
function viewdetails_off() { document.getElementById('butviewdetails').src='/images/viewdetails-button.gif'; }
function login_on() { document.getElementById('butlogin').src='/images/login-button-over.gif'; }
function login_off() { document.getElementById('butlogin').src='/images/login-button.gif'; }