실습문제4-1.pdf
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<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<script>
var phoneNum="010-2345-1234"
var result_1= phoneNum.substring(0,9);
document.write(result_1,"****<br>");
var imgSrc="images/bnt_out.jpg";
var result_2= imgSrc.replace("out","over");
document.write(result_2,"<br>");
</script>
</head>
<body>
</body>
</html>
실습문제4-2.pdf
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<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<script>
var menu=["짜장면","돈가스","된장국","김치찌개","회덮밥"];
var menuNum= Math.floor(Math.random()*5);
var result= menu[menuNum];
document.write(result);
</script>
</head>
<body>
</body>
</html>