var mydate=new Date()
<script type="text/javascript">
? var mydate=new Date();
? var weekday=["星期一","星期二","星期三","星期四","星期五","星期六","星期日"];
? document.write("今天是：" + mydate.getDay());
</script>
請(qǐng)問(wèn)一下，var weekday=["星期一","星期二","星期三","星期四","星期五","星期六","星期日"];這個(gè)有什么作用？因?yàn)槲以囘^(guò)把他刪除了對(duì)結(jié)果是沒(méi)有影響的，這里為什么要寫(xiě)他呀？
2017-01-08
你輸出的結(jié)果肯定是數(shù)字吧？這里你想要輸出星期幾的話就要用到weekday這個(gè)數(shù)組啊，因?yàn)間etDay()方法返回的是數(shù)值，所以你想知道星期幾得創(chuàng)建weekday這樣的數(shù)組。你在最后的結(jié)果中沒(méi)有調(diào)用數(shù)組，當(dāng)然不會(huì)有效果。應(yīng)該這樣，前面加個(gè)weekday。
<script?type="text/javascript"> ??var?mydate=new?Date(); ??var?weekday=["星期一","星期二","星期三","星期四","星期五","星期六","星期日"]; ??document.write("今天是："?+?weekday[mydate.getDay()]); </script>