<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>php.cn</title>
<script type="text/javascript">
//在<body>中输出一句话
document.write("欢迎来到php.cn");
window.alert("Sorry,The paassword your input is uncorrect,Please try again!")
</script>
</head>
<body>
</body>
</html>
You can omit the last line, but it is not recommended
Characteristics of the JavaScript language:
There is no need to add a semicolon after each statement. This is the case when only one statement is written in one line;
If multiple statements are written in one line, each statement It is necessary to use a semicolon to separate;
But most languages require a semicolon at the end. In order to get used to it
so, it is voluntary to add it or not, but it is recommended to add it
You don’t need to add
, just change the line
You can add it or not