<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>判斷語句</title>
<script type="text/javascript">
var myage = 18; if(myage>=18) //myage>=18是判斷條件 { document.write("你是成年人。");} else //否則年齡小于18 { document.write("未滿18歲,你不是成年人。");}
</script>
</head>
<body>
</body>
</html>
教材就是這樣寫的,瀏覽器運行不了!我已經(jīng)修改了n編了!
慕粉1043575294
2017-06-12 18:25:50