jQuery/javascript实现简单网页计算器

 1 <html>
 2 <head>
 3 <meta charset="utf-8">
 4 <title>jQuery实现</title>
 5 <script src="jquery.js"></script>
 6 
 7 <style type="text/css">
 8     table{background-color:pink;width:300px;height:200px;}
 9     td{text-align:center;}
10 </style>
11 
12 <script language="javascript">
13     $("document").ready(function(){
14         $("#b1").click(function(){
15             var num1=$("#num1").val();
16             var num2=$("#num2").val();
17             var num3=eval(num1)+eval(num2);
18             $("#num3").val(num3);
19             
20         });
21         
22         $("#b2").click(function(){
23             var num1=$("#num1").val();
24             var num2=$("#num2").val();
25             var num3=eval(num1)-eval(num2);
26             $("#num3").val(num3);
27         });
28         
29         $("#b3").click(function(){
30             var num1=$("#num1").val();
31             var num2=$("#num2").val();
32             var num3=eval(num1)*eval(num2);
33             $("#num3").val(num3);
34         });
35         
36         $("#b4").click(function(){
37             var num1=$("#num1").val();
38             var num2=$("#num2").val();
39             var num3=eval(num1)/eval(num2);
40             $("#num3").val(num3);
41         });
42     });
43 </script>
44 </head>
45 <body>
46 <center>
47 <form action="" method="post">
48     <table border="1px">
49         <tr>
50             <td>数字1：</td>
51             <td><input type="text" id="num1"/></td>
52         </tr>
53         <tr>
54             <td>数字2：</td>
55             <td><input type="text" id="num2"/></td>
56         </tr>
57         <tr>
58             <td>结果：</td>
59             <td><input type="text" id="num3"/></td>
60         </tr>
61         <tr>
62             <td colspan="4">
63                 <input type="button" value="加" id="b1"/>
64                 <input type="button" value="减" id="b2"/>
65                 <input type="button" value="乘" id="b3"/>
66                 <input type="button" value="除" id="b4"/>    
67             </td>
68         </tr>
69     </table>
70 </form>
71 <center>
72 </body>
73 </html>

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>九九乘法表</title>        
    <style type="text/css">
        table{
            background-color:pink;
            color:red;
        }
    </style>
</head>
<body>
    <h1>计算器</h1>
    <table border="1" align="center">    
        <tr>
            <td>数值1：<input type="text" name="num1" id="num1"/></td>
        </tr>
        <tr>
            <td>数值2：<input type="text" name="num2" id="num2"/></td>
        </tr>
        <tr>
            <td>结&nbsp;&nbsp;果：<input type="text" name="num3" id="num3"/></td>
        </tr>
        <tr>
            <td colspan="4"><input type="button" value="加法" style="color:blue;" onclick="add()"/>
            <input type="button" value="减法" style="color:blue;" onclick="reduce()"/>
            <input type="button" value="乘法" style="color:blue;" onclick="multiplication()"/>
            <input type="button" value="除法" style="color:blue;" onclick="division()"/>
            </td>    
        </tr>
            
    </table>
    <script language="javascript">
        function add(){
            var num1=document.getElementById("num1").value;
            var num2=document.getElementById("num2").value;
            if(parseInt(num1)==num1){
                var num1=parseInt(num1);
            }else{
                var num1=parseFloat(num1);
                num1=parseFloat(num1.toFixed(2));
            }
            if(parseInt(num2)==num2){
                var num2=parseInt(num2);
            }else{
                var num2=parseFloat(num2);
                num2=parseFloat(num2.toFixed(2));/*小数点尾度精确到2*/
            }
            document.getElementById("num3").value=num1+num2;
        }
        function reduce(){
            var num1=document.getElementById("num1").value;
            var num2=document.getElementById("num2").value;
            if(parseInt(num1)==num1){
                var num1=parseInt(num1);
            }else{
                var num1=parseFloat(num1);
                num1=parseFloat(num1.toFixed(2));
            }
            if(parseInt(num2)==num2){
                var num2=parseInt(num2);
            }else{
                var num2=parseFloat(num2);
                num2=parseFloat(num2.toFixed(2));/*小数点尾度精确到2*/
            }
            document.getElementById("num3").value=num1-num2;
        }
        function multiplication(){
            var num1=document.getElementById("num1").value;
            var num2=document.getElementById("num2").value;
            if(parseInt(num1)==num1){
                var num1=parseInt(num1);
            }else{
                var num1=parseFloat(num1);
                num1=parseFloat(num1.toFixed(2));
            }
            if(parseInt(num2)==num2){
                var num2=parseInt(num2);
            }else{
                var num2=parseFloat(num2);
                num2=parseFloat(num2.toFixed(2));/*小数点尾度精确到2*/
            }
            document.getElementById("num3").value=num1*num2;
        }
        function division(){
            var num1=document.getElementById("num1").value;
            var num2=document.getElementById("num2").value;
            if(parseInt(num1)==num1){
                var num1=parseInt(num1);
            }else{
                var num1=parseFloat(num1);
                num1=parseFloat(num1.toFixed(2));
            }
            if(parseInt(num2)==num2){
                var num2=parseInt(num2);
            }else{
                var num2=parseFloat(num2);
                num2=parseFloat(num2.toFixed(2));/*小数点尾度精确到2*/
            }
            document.getElementById("num3").value=num1/num2;
        }
    </script>
</body>
</html>