var ns = (document.layers)? true:false;
var ie = (document.all)? true:false;
if (ns) document.captureEvents(Event.MOUSEDOWN || Event.CLICK);
document.onclick = sourcecodeprotect;
document.onmousedown = sourcecodeprotect;

// ***********************************************************
function sourcecodeprotect(e) {
  if (ns&&(e.which==3)) return false;
  else if (ie&&(window.event.button==2)) alert("Source code protected");
  else return true;
  }

//***********************************************************
function cleanup() {
  if (ns) document.releaseEvents(Event.MOUSEDOWN || Event.CLICK);
  }