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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>文档标题</title>
</head>
<body>
<table id="calculater" onClick="calculater()">
<tr>
<td id="display" colspan="5">0</td>
</tr>
<td class="numberkey" >1</td>
<td class="numberkey" >2</td>
<td class="numberkey" >3</td>
<td class="numberkey" >+</td>
<td class="numberkey" id="deletesign">c</td>
<td class="numberkey" >4</td>
<td class="numberkey" >5</td>
<td class="numberkey" >6</td>
<td class="numberkey" >-</td>
<td rowspan="3" id="equality" onclick="resultscalcaulte()">=</td>
<td class="numberkey" >7</td>
<td class="numberkey" >8</td>
<td class="numberkey" >*</td>
<tr >
<td class="numberkey" >+/-</td>
<td class="numberkey" >0</td>
<td class="numberkey" >.</td>
<td class="numberkey" >/</td>
</body>
</html>
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var results="";
var calresults="";
function calculater(){
if (event.srcElement.innerText=="=") {
return;
}
results+=event.srcElement.innerText;
display.innerText=results;
function resultscalcaulte(){
calresults=eval(results);
display.innerText=calresults;
*{
padding:0;
margin:1px;
#calculater{
margin: auto;
margin-top: 30px;
border: solid 6px #2371D3;
border-spacing: 0px;
#display{
width: 100%;
height: 30px;
border-bottom: solid 4px #2371D3;
font-weight: bold;
color: #193D83;
font-family: 黑体;
padding-left: 2px;
.numberkey{
cursor: pointer;
width: 40px;
border: solid 1px #FFFFFF;
background: #2371D3;
color: #ffffff;
text-align: center;
#equality{
height: 100%;
.numberkey:hover{
background: #EA6F30;
#equality:hover{
