var n = (document.layers) ? 1 : 0;
var was_cursor_init = 0;

function cursorInit(){
if (n) document.captureEvents(Event.CONTEXTMENU);
document.oncontextmenu = m;
was_cursor_init = 1;
}
function m(e){return false;}
function st(){
if ( was_cursor_init == 0 ) cursorInit();
}

onload=cursorInit;