Sağ Tuş Engelleme

<script>

browserName        = navigator.appName
browserVersion      = parseInt(navigator.appVersion)

document.onmousedown = checkforRightMouseButtonClick;
if (browserVersion<5 && browserName=="Netscape")
{
    window.onmousedown = checkforRightMouseButtonClick;
}

function rightClickPressed()
{
  alert("Bu Sitede Sağ Tıklamak Yasaktır!");
}

function checkforRightMouseButtonClick(mouseEvent)
{
if ( ((browserName=="Microsoft Internet Explorer") && (event.button >1)) ||
      ((browserName=="Ne tscape") && (mouseEvent.which > 1)) )
    {
      rightClickPressed()
      return false;
    }
else
  return true;
}
</script>