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JavascriptÍøÒ³¼ÆËãÆ÷

<!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=UTF-8" />
<title>ÍøÒ³¼ÆËãÆ÷</title>
<style type="text/css">
#container
{
width: 432px;
margin: 0 auto;
text-align: center;
height: 324px;
}
div
{
text-align: left;
width: 400px;
}
input
{
height: 37px;
width: 93px;
margin-bottom: 10px;
background: #CA0;
font-size: 30px;
}
input#answer
{
height: 37px;
width: 381px;
color: #FFF;
font-size: 35px;
text-align: right;
background: #38B;
}
input#equ
{
height: 37px;
width: 190px;
}
input#rst
{
height: 37px;
width: 190px;
}
</style>
<script language="javascript" type="text/javascript">
// ´íÎó´¦Àí
window.onerror = function killerr() {
return true;
}
// ¼ÆËãËùÐèµÄÁ½¸öÒòÊý
var param1, param2;
// ¼ÆËã½á¹û
var answer;
// ÔËËã·û
var oprt;
// ÒòÊý±ê¼Ç
var flag;
// ¼ÆËã²ÎÊý·ÖÅ亯Êý
function doCalc(val) {
if (document.getElementById("answer").getAttribute("value") == "ERROR" && val != "CE") {
// ¼ÆËãÆ÷³ö´íʱÌáʾ£¬²¢ÖÕÖ¹²Ù×÷
alert("Please reset calculator");
return false;
}
switch (val) {
// ²Ù×÷·û
case "+":
case "-":


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