// JScript 文件

   function show(num)
    {
        if(num==1)
           { document.getElementById("zxzx").style.display="block";
             document.getElementById("zbzc").style.display="none";
             document.getElementById("kbtz").style.display="none";
             
             }
        if(num==2)
            {
            document.getElementById("zxzx").style.display="none";
            document.getElementById("zbzc").style.display="block";
              document.getElementById("kbtz").style.display="none";   
             }
        if(num==3)
        {
             document.getElementById("zxzx").style.display="none";
              document.getElementById("zbzc").style.display="none";
            document.getElementById("kbtz").style.display="block";  
         }  
    }