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<html><body><script type="text/javascript">var d = new Date()var time = d.getHours()if (time < 10) {document.write("<b>早安</b>")}</script><p>本例示範 If 語句。</p><p>如果瀏覽器時間小於 10，那麼會向您問“早安”。</p></body></html>
If...Else 語句。
<html><body><script type="text/javascript">var d = new Date()var time = d.getHours()if (time < 10) {document.write("<b>早安</b>")}else{document.write("<b>祝您愉快</b>")}</script><p>本例示範 If...Else 語句。</p><p>如果瀏覽器時間小於 10，那麼會向您問“早安”，否則會向您問候“祝您愉快”。</p></body></html>
<html><body><script type="text/javascript">var d = new Date()var time = d.getHours()if (time<10){document.write("<b>Good morning</b>")}else if (time>=10 && time<16){document.write("<b>Good day</b>")}else{document.write("<b>Hello World!</b>")}</script><p>本例示範 if..else if...else 語句。</p></body></html>
<html><body><script type="text/javascript">var r=Math.random()if (r>0.5) {document.write("<a href='../index.htm'/*tpa=http://www.w3school.com.cn/*/>學習 Web 開發！</a>")}else{document.write("<a href='http://www.microsoft.com/'>訪問微軟！</a>")}</script></body></html>
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