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jQuery/javascript实现简单网页计算器

2016-09-28 14:15 716 查看

<html>
<head>
<meta charset="utf-8">
<title>jQuery实现</title>
<script src="jquery.js"></script>

<style type="text/css">
table{background-color:pink;width:300px;height:200px;}
td{text-align:center;}
</style>

<script language="javascript">
$("document").ready(function(){
$("#b1").click(function(){
var num1=$("#num1").val();
var num2=$("#num2").val();
var num3=eval(num1)+eval(num2);
$("#num3").val(num3);

});

$("#b2").click(function(){
var num1=$("#num1").val();
var num2=$("#num2").val();
var num3=eval(num1)-eval(num2);
$("#num3").val(num3);
});

$("#b3").click(function(){
var num1=$("#num1").val();
var num2=$("#num2").val();
var num3=eval(num1)*eval(num2);
$("#num3").val(num3);
});

$("#b4").click(function(){
var num1=$("#num1").val();
var num2=$("#num2").val();
var num3=eval(num1)/eval(num2);
$("#num3").val(num3);
});
});
</script>
</head>
<body>
<center>
<form action="" method="post">
<table border="1px">
<tr>
<td>数字1：</td>
<td><input type="text" id="num1"/></td>
</tr>
<tr>
<td>数字2：</td>
<td><input type="text" id="num2"/></td>
</tr>
<tr>
<td>结果：</td>
<td><input type="text" id="num3"/></td>
</tr>
<tr>
<td colspan="4">
<input type="button" value="加" id="b1"/>
<input type="button" value="减" id="b2"/>
<input type="button" value="乘" id="b3"/>
<input type="button" value="除" id="b4"/>
</td>
</tr>
</table>
</form>
<center>
</body>
</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  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>

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