有些時候我們需要根據某些條件來控制Web頁面中的HTML元素顯示還是隱藏，可以通過display或visibility來實現。通過下面的例子瞭解display和visibility的區別，簡單的例子代碼如下：
- <html>
- <head>
- <title>HTML元素的顯示與隱藏控制</title>
- <script type="text/javascript">
- function showAndHidden1(){
- var div1=document.getElementById("div1");
- var div2=document.getElementById("div2");
- if(div1.style.display=='block') div1.style.display='none';
- else div1.style.display='block';
- if(div2.style.display=='block') div2.style.display='none';
- else div2.style.display='block';
- }
- function showAndHidden2(){
- var div3=document.getElementById("div3");
- var div4=document.getElementById("div4");
- if(div3.style.visibility=='visible') div3.style.visibility='hidden';
- else div3.style.visibility='visible';
- if(div4.style.visibility=='visible') div4.style.visibility='hidden';
- else div4.style.visibility='visible';
- }
- </script>
- </head>
- <body>
- <div>display：元素的位置不被佔用</div>
- <div id="div1" style="display:block;">DIV 1</div>
- <div id="div2" style="display:none;">DIV 2</div>
- <input type="button" onclick="showAndHidden1();" value="DIV切換" />
- <hr>
- <div>visibility：元素的位置仍被佔用</div>
- <div id="div3" style="visibility:visible;">DIV 3</div>
- <div id="div4" style="visibility:hidden;">DIV 4</div>
- <input type="button" onclick="showAndHidden2();" value="DIV切換" />
- </body>
- </html>
- <html>
- <head>
- <title>HTML元素的顯示與隱藏控制</title>
- <script type="text/javascript">
- function showAndHidden1(){
- var div1=document.getElementById("div1");
- var div2=document.getElementById("div2");
- if(div1.style.display=='block') div1.style.display='none';
- else div1.style.display='block';
- if(div2.style.display=='block') div2.style.display='none';
- else div2.style.display='block';
- }
- function showAndHidden2(){
- var div3=document.getElementById("div3");
- var div4=document.getElementById("div4");
- if(div3.style.visibility=='visible') div3.style.visibility='hidden';
- else div3.style.visibility='visible';
- if(div4.style.visibility=='visible') div4.style.visibility='hidden';
- else div4.style.visibility='visible';
- }
- </script>
- </head>
- <body>
- <div>display：元素的位置不被佔用</div>
- <div id="div1" style="display:block;">DIV 1</div>
- <div id="div2" style="display:none;">DIV 2</div>
- <input type="button" onclick="showAndHidden1();" value="DIV切換" />
- <hr>
- <div>visibility：元素的位置仍被佔用</div>
- <div id="div3" style="visibility:visible;">DIV 3</div>
- <div id="div4" style="visibility:hidden;">DIV 4</div>
- <input type="button" onclick="showAndHidden2();" value="DIV切換" />
- </body>
- </html>