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<body>
<pre id="t1">
I have tabs inside!
</pre>
<p>点击“尝试一下”按钮，改变 PRE 元素的 tab-size 属性。</p>
<button onclick="myFunction()">尝试一下</button>
<script>
function myFunction()
{
document.getElementById("t1").style.tabSize = "16";
document.getElementById("t1").style.MozTabSize = "16"; // 针对 Firefox 的代码
document.getElementById("t1").style.OTabSize = "16"; // 针对 Opera 的代码
}
</script>
<p><b>Note:</b> The tabSize property is currently only supported in Chrome.</p>
<p><b>Note:</b> Firefox supports an alternative, the MozTabSize property.</p>
<p><b>Note:</b> Opera supports an alternative, the OTabSize property.</p>
</body>
</html>