file://加入页面保护
 
    function rf() 
      {return false; } 
    document.oncontextmenu = rf 
    function keydown() 
      {if(event.ctrlKey ==true || event.keyCode ==93 || event.shiftKey ==true){return false;} } 
      document.onkeydown =keydown 
    function drag() 
      {return false;} 
    document.ondragstart=drag  
function stopmouse(e) {  
  if (navigator.appName == 'Netscape' && (e.which == 3 || e.which == 2))   
   return false;  
      else if   
      (navigator.appName == 'Microsoft Internet Explorer' && (event.button == 2 || event.button == 3)) {   
   alert("美格爱科欢迎您的来访!"); 
  return false;   
   } 
  return true;  
      }  
      document.onmousedown=stopmouse;   
      if (document.layers)  
      window.captureEvents(Event.MOUSEDOWN);  
       window.onmousedown=stopmouse;