<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
</head>
<body>
<input type="text" name="" id="">
<input type="button" value="加密">
<p>加密結果</p>
<script>
var inp = document.getElementsByTagName('input')[0];
var btn = document.getElementsByTagName('input')[1];
var p = document.getElementsByTagName('p')[0];
btn.onclick = function(){
var val = inp.value;
var str = '';
for(var i = 0; i< val.length; i++){
str += String.fromCharCode(val.charCodeAt(i)+1000);
}
p.innerHTML = str;
}
</script>
</body>
</html>
