点击显示隐藏

<input type=”button” value=”显示隐藏” id=”aaa”>   

 <input type=”button” value=”出来了” id=”ccc”>

<script>     

   var a=document.getElementById(‘aaa’);       

 var b=document.getElementById(‘ccc’);       

 a.onclick = function(){          

  if(b.style.display==’block'{               

 b.style.display=’none’;           

 }else{              

  b.style.display=’block’;     

       }   

     };              

     </script>