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javascript 控制左右键盘

<html>  
  <head>  
          <script language="javascript">  
                  function MyClick()  
                  {  
                          if(event.button == 1)  
                          {
                                  alert("您好");
                          }
                          else if(event.button == 2)
                          {  
                                  alert("禁止右键");
                                  setTimeout("MyClose();",120000);
           &nbs


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