if (window != top)  {
    //Inside an iframe check
    top.location.href = location.href;
}

               var message="Right Click is not allowed";
               function clickIE4(){

                             if (event.button==2){

                             alert(message);

                             return false;

                             }

               }

               function clickNS4(e){

                             if (document.layers||document.getElementById&&!document.all){

                                            if (e.which==2||e.which==3){

                                                          alert(message);

                                                          return false;

                                            }

                             }

               }

               if (document.layers){

                             document.captureEvents(Event.MOUSEDOWN);

                             document.onmousedown=clickNS4;

               }

               else if (document.all&&!document.getElementById){

                             document.onmousedown=clickIE4;

               }

               document.oncontextmenu=new Function("alert(message);return false;")