<html> <head> <title>shu</title> <style>#div1{width:200px;height:200px;border:1px solid red;background:grey;display:none;}</style> <script> function show(){ var a=document.getElementById("div1"); a.style.display='block'; } function over(){ var a=document.getElementById("div1"); a.style.display='none'; } </script> </head> <body> <input type="checkbox" onmouseover="show();" onmouseout="over();"/> <div id="div1"> 為了您的信息安全 </div> </body> </html>

鼠標移入到input上的時候,讓div1顯示
鼠標移出input的時候,讓div1隱藏
div1顯示:
div1的display變成block
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事件:用戶操作
on click
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div1.style.display='block';
. 的
div1的style的display
<html> <head> <title>shu</title> <script> function show(){ var i=document.getElementById("tishi"); i.click=alert("您確定嗎?"); } </script> </head> <body> <div id="div1"> 點擊確認進入下一步操作: </div> <button id="tishi" onclick="show();">確定</button> </body> </html>

