复制代码 代码如下:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>计算器</title>
<script language="javascript" type="text/javascript">
var clearFlag=false;
function getNum(num){
//alert(num);
var objresult=document.getElementById("result");
if(clearFlag){
objresult.value="";
clearFlag=false;
}
//alert(objresult);
objresult.value+=num;
}
function getResult(){
var objresult=document.getElementById("result");
objresult.value=objresult.value+"="+eval(objresult.value);
clearFlag=true;
}
</script>
</head>
<body>
<table cellpadding="2">
<tr>
<td colspan="4"><input type="text" size="33"></td>
</tr>
<tr>
<td><input type="button" value=" 1 "></td>
<td><input type="button" value=" 2 "></td>
<td><input type="button" value=" 3 "></td>
<td><input type="button" value=" + "></td>
</tr>
<tr>
<td><input type="button" value=" 4 "></td>
<td><input type="button" value=" 5 "></td>
<td><input type="button" value=" 6 "></td>
<td><input type="button" value=" - "></td>
</tr>
<tr>
<td><input type="button" value=" 7 "></td>
<td><input type="button" value=" 8 "></td>
<td><input type="button" value=" 9 "></td>
<td><input type="button" value=" * "></td>
</tr>
<tr>
<td><input type="button" value=" 0 "></td>
<td><input type="button" value=" . "></td>
<td><input type="button" value=" = "></td>
<td><input type="button" value=" / "></td>
</tr>
</table>
</body>
</html>
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