随机数生成器代码HTML5
代码如下
<!DOCTYPE html>
<html>
<head>
<title>随机数生成器</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<style>
body {
text-align: center;
background-color: #f2f2f2;
font-family: Arial, sans-serif;
}
h1 {
color: #333;
}
.container {
width: 300px;
margin: 0 auto;
padding: 20px;
background-color: #fff;
border-radius: 5px;
box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}
label {
display: block;
margin-bottom: 10px;
}
input[type="number"] {
width: 100%;
padding: 8px;
border: 1px solid #ccc;
border-radius: 4px;
}
input[type="checkbox"] {
margin-top: 5px;
}
button {
display: block;
width: 100%;
padding: 10px;
margin-top: 20px;
background-color: #4CAF50;
color: #fff;
border: none;
border-radius: 4px;
cursor: pointer;
}
.result {
margin-top: 20px;
font-size: 18px;
font-weight: bold;
}
</style>
</head>
<body>
<div class="container">
<h1>随机数生成器</h1>
<label for="length">字符数量:</label>
<input type="number" id="length" min="1" max="100" value="8">
<label for="include-letters">
<input type="checkbox" id="include-letters" checked>
包含英文字母
</label>
<label for="include-symbols">
<input type="checkbox" id="include-symbols" checked>
包含符号
</label>
<label for="include-digits">
<input type="checkbox" id="include-digits" checked>
包含数字
</label>
<button οnclick="generateRandomString()">生成</button>
<div class="result" id="result"></div>
</div>
<script>
function generateRandomString() {
var length = document.getElementById("length").value;
var includeLetters = document.getElementById("include-letters").checked;
var includeSymbols = document.getElementById("include-symbols").checked;
var includeDigits = document.getElementById("include-digits").checked;
var letters = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
var symbols = "!@#$%^&*()";
var digits = "0123456789";
var characters = "";
if (includeLetters) {
characters += letters;
}
if (includeSymbols) {
characters += symbols;
}
if (includeDigits) {
characters += digits;
}
var result = "";
for (var i = 0; i < length; i++) {
var randomIndex = Math.floor(Math.random() * characters.length);
result += characters.charAt(randomIndex);
}
document.getElementById("result").innerHTML = result;
}
</script>
</body>
</html>