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代码编辑器：

<style>
#myDIV {text-align: justify; }
</style>
<div id="myDIV">
You can use the text-align-last property to align the last line of a text, if the text has the text-align property set to justify. This text is where you will see the result of the  text-align-last property. You can use the text-align-last property to align the last line of a text, if the text has the text-align property set to justify. This text is where you will see the result of the  text-align-last property.
You can use the text-align-last property to align the last line of a text, if the text has the text-align property set to justify. This text is where you will see the result of the  text-align-last property.
You can use the text-align-last property to align the last line of a text, if the text has the text-align property set to justify. This text is where you will see the result of the  text-align-last property.
You can use the text-align-last property to align the last line of a text, if the text has the text-align property set to justify. This text is where you will see the result of the  text-align-last property.
You can use the text-align-last property to align the last line of a text, if the text has the text-align property set to justify. This text is where you will see the result of the  text-align-last property.
You can use the text-align-last property to align the last line of a text, if the text has the text-align property set to justify. This text is where you will see the result of the  text-align-last property.
You can use the text-align-last property to align the last line of a text, if the text has the text-align property set to justify. This text is where you will see the result of the  text-align-last property.
</div>
<p>点击“尝试一下”按钮，改变 DIV 元素的 text-align-last 属性</p>
<button onclick="myFunction()">尝试一下</button>
<script>
function myFunction(){
	document.getElementById("myDIV").style.textAlignLast = "right";
	document.getElementById("myDIV").style.MozTextAlignLast = "right"; // 针对 Firefox 的代码
}
</script>
<p><b>注意：</b>目前只有 Internet Explorer 支持 textAlignLast 属性</p>
<p><b>注意：</b>Firefox 支持另一个可替代该属性的属性，即 MozTextAlignLast 属性</p>

运行结果：