function noRightClick() {
     if (event.srcElement.disabled == false && ( event.srcElement.type == 'text' || event.srcElement.type == 'textarea' )) {
          return true;
     } else {
          event.keyCode=0;
          event.returnValue=false;                    
          return false;
     }
	}

	oncontextmenu="noRightClick();"