1 <!DOCTYPE html>
2 <html>
3 <head>
4 <meta charset="UTF-8">
5 <title>计算器</title>
6 </head>
7 <body>
8 <input type="text" name="" id="a" placeholder="请输入一个数" />
9 <select name=""id="b">
10 <option value="1">+</option>
11 <option value="2">-</option>
12 <option value="3">*</option>
13 <option value="4">/</option>
14 <option value="5">%</option>
15 </select>
16 <input type="text" id="c" placeholder="请输入一个数" //>
17 =<input type="text" id="p"/>
18 <input type="button" id="d" value="计算" />
19 <script type="text/javascript">
20 var e=document.getElementById(‘d‘);
21 e.onclick = function(aaa){
22 var m = document.getElementById(‘a‘).value;
23 var x = document.getElementById(‘b‘).value;
24 var n = document.getElementById(‘c‘).value;
25 var y = document.getElementById(‘p‘);
26 // alert(m);
27 // alert(x);
28 // alert(n);
29 if(Number(x)==1){
30 y.value=Number(m)+Number(n);
31 }
32 else if(Number(x)==2){
33 y.value=Number(m)-Number(n);
34 }
35 else if(Number(x)==3){
36 y.value=Number(m)*Number(n);
37 }
38 else if(Number(x)==4){
39 y.value=Number(m)/Number(n);
40 }
41 else if(Number(x)==5){
42 y.value=Number(m)%Number(n);
43 }
44 }
45 </script>
46 </body>
47 </html>
时间： 2024-11-05 06:59:01