head {
<SCRIPT language=JavaScript>

var message = "function disabled"; 
function rtclickcheck(keyp){ if (navigator.appName == "Netscape" && keyp.which == 3){ alert(message); return false; } 
if (navigator.appVersion.indexOf("MSIE") != -1 && event.button == 2) { alert(message); return false; } } 
document.onmousedown = rtclickcheck;
</SCRIPT>}