简单的计算器
实时更新时间
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>在线计算器</title>
<style>
table {
margin: auto;
text-align: center;
background-color: darkgray;
}
div {
width: 500px;
height: 500px;
border: 10 solid black;
margin: auto;
}
</style>
<script>
function result(op) {
var num1, num2;
num1 = Number(document.getElementById("num1").value);
num2 = Number(document.getElementById("num2").value);
switch(op) {
case '+':
document.getElementById("result").value = num1 + num2;
break;
case '-':
document.getElementById("result").value = num1 - num2;
break;
case '*':
document.getElementById("result").value = num1 * num2;
break;
case '/':
document.getElementById("result").value = num1 / num2;
break;
}
}
</script>
</head>
<body>
<div>
<p align="center" style="margin-top: 100px;">
当地时间：<input type="text" id="1" size="22" />
<script>
function a() {
var data = new Date();
var time = data.toLocaleString();
document.getElementById("1").value = time;
}
setInterval("a()", 1)
</script>
</p>
<table>
<tr>
<td colspan="4">简单计算器<br/>
<hr/>
</td>
</tr>
<tr>
<td colspan="4">第一个数<input type="text" id="num1" /></td>
</tr>
<tr>
<td colspan="4">第二个数<input type="text" id="num2" /><br/>
<hr/>
</td>
</tr>
<tr>
<td>
<input type="button" value="+" onclick="result('+')" />
</td>
<td>
<input type="button" value="-" onclick="result('-')" />
</td>
<td>
<input type="button" value="*" onclick="result('*')" />
</td>
<td>
<input type="button" value="/" onclick="result('/')" />
</td>
</tr>
<tr>
<td colspan="4">
<hr/>
</td>
</tr>
<tr>
<td colspan="4">计算结果<input type="text" id="result" /></td>
</tr>
</table>
</div>
</body>
</html>