大家看這段代碼問題在哪？為什么第二個(gè)document.write()結(jié)果出不來？
<!Doctype html>
<html>
??? <head>
??????? <meta charset="utf-8">
??????? <title>返回/設(shè)置時(shí)間方法</title>
??? </head>
??? <script>
??????? function mySelect()
??????? {
??????????? var mydate=new Date(); //獲取當(dāng)前日期
??????????? document.write("當(dāng)前日期為"+ mydate+"<br>");???? // 輸出當(dāng)前日期
??????????? mydate.setTime(mydate.getTime()-2*60*60*1000);
??????????? document.write("后來日期為:"+mydate);????? // 輸出后來日期
??????? }
??? </script>
??? <body>
??????? <div>
??????????? <input type="button" value="讓時(shí)間 倒退兩小時(shí)" onclick="mySelect()">
??????? </div>
??? </body>
???
?
</html>
<html>
??? <head>
??????? <meta charset="utf-8">
??????? <title>返回/設(shè)置時(shí)間方法</title>
??? </head>
??? <script>
??????? function mySelect()
??????? {
??????????? var mydate=new Date(); //獲取當(dāng)前日期
??????????? document.write("當(dāng)前日期為"+ mydate+"<br>");???? // 輸出當(dāng)前日期
??????????? mydate.setTime(mydate.getTime()-2*60*60*1000);
??????????? document.write("后來日期為:"+mydate);????? // 輸出后來日期
??????? }
??? </script>
??? <body>
??????? <div>
??????????? <input type="button" value="讓時(shí)間 倒退兩小時(shí)" onclick="mySelect()">
??????? </div>
??? </body>
???
?
</html>
2017-08-02
你把代碼放到自己的編譯器上試試
2017-02-21
顯示正常。
2017-01-05
我的電腦上也沒問題
2017-01-05
? mydate.setTime(mydate.getTime()-2*60*60*1000);怎么成減號(hào)了
2016-12-15
我電腦上沒問題