2019-01-11作业
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<script>
function set(){
a =prompt("用户名");
grade =prompt("级别");
money = prompt("余额");
if( a ==0 && grade >=2 && money>30){
alert("您可以下载本资源")
}else{
alert("您不可以下载本资源")
}
}
</script>
</head>
<body>
<form>
点击下载本影片<input type="button" value="下载" onclick="set()">
</form>
</body>
</html>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<script>
function a(){
var b=document.forms[0].b.value;
var age=2019-b;
alert("您今年"+age+"岁");
}
</script>
</head>
<body>
<form>
请输入您的出生日期(yyyy/mm/dd)
<input type="text" size="8" name="b">
/<input type="text" size="8">
/<input type="text" size="8">
<br>
<input type="button" value="计算" onclick="a()">
</form>
</body>
</html>