本文介绍了一个使用JavaScript实现的简单网页计算器。该计算器支持多种运算符，并能够处理不同进制的数值输入。文章详细解释了计算器的功能，包括数字键、运算符处理、内存操作等。
<html>
<head>
<title></title>
<script language="javascript">
<!--
var endNumber = true
var mem = 0
var carry = 10
var hexnum = "0123456789abcdef"
var angle = "d"
var stack = ""
var level = "0"
var layer = 0
//数字键
function inputkey(key) {
var index = key.charCodeAt(0);
if ((carry == 2 && (index == 48 || index == 49))
|| (carry == 8 && index >= 48 && index <= 55)
|| (carry == 10 && (index >= 48 && index <= 57 || index == 46))
|| (carry == 16 && ((index >= 48 && index <= 57) || (index >= 97 && index <= 102))))
if (endNumber) {
endNumber = false
document.calc.display.value = key
}
else if (document.calc.display.value == null || document.calc.display.value == "0")
document.calc.display.value = key
else
document.calc.display.value += key
}
function changeSign() {
if (document.calc.display.value != "0")
if (document.calc.display.value.substr(0, 1) == "-")
document.calc.display.value = document.calc.display.value.substr(1)
else
document.calc.display.value = "-" + document.calc.display.value
}
//函数键
function inputfunction(fun, shiftfun) {
endNumber = true
if (document.calc.shiftf.checked)
document.calc.display.value = decto(funcalc(shiftfun, (todec(document.calc.display.value, carry))), carry)
else
document.calc.display.value = decto(funcalc(fun, (todec(document.calc.display.value, carry))), carry)
document.calc.shiftf.checked = false
document.calc.hypf.checked = false
inputshift()
}
function inputtrig(trig, arctrig, hyp, archyp) {
if (document.calc.hypf.checked)
inputfunction(hyp, archyp)
else
inputfunction(trig, arctrig)
}
//运算符
function operation(join, newlevel) {
endNumber = true
var temp = stack.substr(stack.lastIndexOf("(") + 1) + document.calc.display.value
while (newlevel != 0 && (newlevel <= (level.charAt(level.length - 1)))) {
temp = parse(temp)
level = level.slice(0, -1)
}
if (temp.match(/^(.*/d[/+/-/*///%/^/&/|x])?([+-]?[0-9a-f/.]+)$/))
document.calc.display.value = RegExp.$2
stack = stack.substr(0, stack.lastIndexOf("(") + 1) + temp + join
document.calc.operator.value = " " + join + " "
level = level + newlevel
}
//括号
function addbracket() {
endNumber = true
document.calc.display.value = 0
stack = stack + "("
document.calc.operator.value = " "
level = level + 0
layer += 1
document.calc.bracket.value = "(=" + layer
}
function disbracket() {
endNumber = true
var temp = stack.substr(stack.lastIndexOf("(") + 1) + document.calc.display.value
while ((level.charAt(level.length - 1)) > 0) {
temp = parse(temp)
level = level.slice(0, -1)
}
document.calc.display.value = temp
stack = stack.substr(0, stack.lastIndexOf("("))
document.calc.operator.value = " "
level = level.slice(0, -1)
layer -= 1
if (layer > 0)
document.calc.bracket.value = "(=" + layer
else
document.calc.bracket.value = ""
}
//等号
function result() {
endNumber = true
while (layer > 0)
disbracket()
var temp = stack + document.calc.display.value
while ((level.charAt(level.length - 1)) > 0) {
temp = parse(temp)
level = level.slice(0, -1)
}
document.calc.display.value = temp
document.calc.bracket.value = ""
document.calc.operator.value = ""
stack = ""
level = "0"
}
//修改键
function backspace() {
if (!endNumber) {
if (document.calc.display.value.length > 1)
document.calc.display.value = document.calc.display.value.substring(0, document.calc.display.value.length - 1)
else
document.calc.display.value = 0
}
}
function clearall() {
document.calc.display.value = 0
endNumber = true
stack = ""
level = "0"
layer = ""
document.calc.operator.value = ""
document.calc.bracket.value = ""
}
//转换键
function inputChangCarry(newcarry) {
endNumber = true
document.calc.display.value = (decto(todec(document.calc.display.value, carry), newcarry))
carry = newcarry
document.calc.sin.disabled = (carry != 10)
document.calc.cos.disabled = (carry != 10)
document.calc.tan.disabled = (carry != 10)
document.calc.bt.disabled = (carry != 10)
document.calc.pi.disabled = (carry != 10)
document.calc.e.disabled = (carry != 10)
document.calc.kp.disabled = (carry != 10)
document.calc.k2.disabled = (carry <= 2)
document.calc.k3.disabled = (carry <= 2)
document.calc.k4.disabled = (carry <= 2)
document.calc.k5.disabled = (carry <= 2)
document.calc.k6.disabled = (carry <= 2)
document.calc.k7.disabled = (carry <= 2)
document.calc.k8.disabled = (carry <= 8)
document.calc.k9.disabled = (carry <= 8)
document.calc.ka.disabled = (carry <= 10)
document.calc.kb.disabled = (carry <= 10)
document.calc.kc.disabled = (carry <= 10)
document.calc.kd.disabled = (carry <= 10)
document.calc.ke.disabled = (carry <= 10)
document.calc.kf.disabled = (carry <= 10)
}
function inputChangAngle(angletype) {
endNumber = true
angle = angletype
if (angle == "d")
document.calc.display.value = radiansToDegress(document.calc.display.value)
else
document.calc.display.value = degressToRadians(document.calc.display.value)
endNumber = true
}
function inputshift() {
if (document.calc.shiftf.checked) {
document.calc.bt.value = "deg "
document.calc.ln.value = "exp "
document.calc.log.value = "expd"
if (document.calc.hypf.checked) {
document.calc.sin.value = "ahs "
document.calc.cos.value = "ahc "
document.calc.tan.value = "aht "
}
else {
document.calc.sin.value = "asin"
document.calc.cos.value = "acos"
document.calc.tan.value = "atan"
}
document.calc.sqr.value = "x^.5"
document.calc.cube.value = "x^.3"
document.calc.floor.value = "小数"
}
else {
document.calc.bt.value = "d.ms"
document.calc.ln.value = " ln "
document.calc.log.value = "log "
if (document.calc.hypf.checked) {
document.calc.sin.value = "hsin"
document.calc.cos.value = "hcos"
document.calc.tan.value = "htan"
}
else {
document.calc.sin.value = "sin "
document.calc.cos.value = "cos "
document.calc.tan.value = "tan "
}
document.calc.sqr.value = "x^2 "
document.calc.cube.value = "x^3 "
document.calc.floor.value = "取整"
}
}
//存储器部分
function clearmemory() {
mem = 0
document.calc.memory.value = " "
}
function getmemory() {
endNumber = true
document.calc.display.value = decto(mem, carry)
}
function putmemory() {
endNumber = true
if (document.calc.display.value != 0) {
mem = todec(document.calc.display.value, carry)
document.calc.memory.value = " M "
}
else
document.calc.memory.value = " "
}
function addmemory() {
endNumber = true
mem = parseFloat(mem) + parseFloat(todec(document.calc.display.value, carry))
if (mem == 0)
document.calc.memory.value = " "
else
document.calc.memory.value = " M "
}
function multimemory() {
endNumber = true
mem = parseFloat(mem) * parseFloat(todec(document.calc.display.value, carry))
if (mem == 0)
document.calc.memory.value = " "
else
document.calc.memory.value = " M "
}
//十进制转换
function todec(num, oldcarry) {
if (oldcarry == 10 || num == 0) return (num)
var neg = (num.charAt(0) == "-")
if (neg) num = num.substr(1)
var newnum = 0
for (var index = 1; index <= num.length; index++)
newnum = newnum * oldcarry + hexnum.indexOf(num.charAt(index - 1))
if (neg)
newnum = -newnum
return (newnum)
}
function decto(num, newcarry) {
var neg = (num < 0)
if (newcarry == 10 || num == 0) return (num)
num = "" + Math.abs(num)
var newnum = ""
while (num != 0) {
newnum = hexnum.charAt(num % newcarry) + newnum
num = Math.floor(num / newcarry)
}
if (neg)
newnum = "-" + newnum
return (newnum)
}
//表达式解析
function parse(string) {
if (string.match(/^(.*/d[/+/-/*///%/^/&/|x/<])?([+-]?[0-9a-f/.]+)([/+/-/*///%/^/&/|x/<])([+-]?[0-9a-f/.]+)$/))
return (RegExp.$1 + cypher(RegExp.$2, RegExp.$3, RegExp.$4))
else
return (string)
}
//数学运算和位运算
function cypher(left, join, right) {
left = todec(left, carry)
right = todec(right, carry)
if (join == "+")
return (decto(parseFloat(left) + parseFloat(right), carry))
if (join == "-")
return (decto(left - right, carry))
if (join == "*")
return (decto(left * right, carry))
if (join == "/" && right != 0)
return (decto(left / right, carry))
if (join == "%")
return (decto(left % right, carry))
if (join == "&")
return (decto(left & right, carry))
if (join == "|")
return (decto(left | right, carry))
if (join == "^")
return (decto(Math.pow(left, right), carry))
if (join == "x")
return (decto(left ^ right, carry))
if (join == "<")
return (decto(left << right, carry))
alert("除数不能为零")
return (left)
}
//函数计算
function funcalc(fun, num) {
with (Math) {
if (fun == "pi")
return (PI)
if (fun == "e")
return (E)
if (fun == "abs")
return (abs(num))
if (fun == "ceil")
return (ceil(num))
if (fun == "round")
return (round(num))
if (fun == "floor")
return (floor(num))
if (fun == "deci")
return (num - floor(num))
if (fun == "ln" && num > 0)
return (log(num))
if (fun == "exp")
return (exp(num))
if (fun == "log" && num > 0)
return (log(num) * LOG10E)
if (fun == "expdec")
return (pow(10, num))
if (fun == "cube")
return (num * num * num)
if (fun == "cubt")
return (pow(num, 1 / 3))
if (fun == "sqr")
return (num * num)
if (fun == "sqrt" && num >= 0)
return (sqrt(num))
if (fun == "!")
return (factorial(num))
if (fun == "recip" && num != 0)
return (1 / num)
if (fun == "dms")
return (dms(num))
if (fun == "deg")
return (deg(num))
if (fun == "~")
return (~num)
if (angle == "d") {
if (fun == "sin")
return (sin(degressToRadians(num)))
if (fun == "cos")
return (cos(degressToRadians(num)))
if (fun == "tan")
return (tan(degressToRadians(num)))
if (fun == "arcsin" && abs(num) <= 1)
return (radiansToDegress(asin(num)))
if (fun == "arccos" && abs(num) <= 1)
return (radiansToDegress(acos(num)))
if (fun == "arctan")
return (radiansToDegress(atan(num)))
}
else {
if (fun == "sin")
return (sin(num))
if (fun == "cos")
return (cos(num))
if (fun == "tan")
return (tan(num))
if (fun == "arcsin" && abs(num) <= 1)
return (asin(num))
if (fun == "arccos" && abs(num) <= 1)
return (acos(num))
if (fun == "arctan")
return (atan(num))
}
if (fun == "hypsin")
return ((exp(num) - exp(0 - num)) * 0.5)
if (fun == "hypcos")
return ((exp(num) + exp(-num)) * 0.5)
if (fun == "hyptan")
return ((exp(num) - exp(-num)) / (exp(num) + exp(-num)))
if (fun == "ahypsin" | fun == "hypcos" | fun == "hyptan") {
alert("对不起,公式还没有查到!")
return (num)
}
alert("超出函数定义范围")
return (num)
}
}
function factorial(n) {
n = Math.abs(parseInt(n))
var fac = 1
for (; n > 0; n -= 1)
fac *= n
return (fac)
}
function dms(n) {
var neg = (n < 0)
with (Math) {
n = abs(n)
var d = floor(n)
var m = floor(60 * (n - d))
var s = (n - d) * 60 - m
}
var dms = d + m / 100 + s * 0.006
if (neg)
dms = -dms
return (dms)
}
function deg(n) {
var neg = (n < 0)
with (Math) {
n = abs(n)
var d = floor(n)
var m = floor((n - d) * 100)
var s = (n - d) * 100 - m
}
var deg = d + m / 60 + s / 36
if (neg)
deg = -deg
return (deg)
}
function degressToRadians(degress) {
return (degress * Math.PI / 180)
}
function radiansToDegress(radians) {
return (radians * 180 / Math.PI)
}
//界面
//-->
</script>
</head>
<!-- Create By Ianse.com -->
<!--2005.10-->
<body>
<table width="100%" height="290" border="0" align="center" cellpadding="0" cellspacing="0"
class="Input">
<tr>
<td width="99" align="center" valign="top">
<style>
#Ianse_MenuHeader
{
cursor: hand;
list-style-image: url(/Images/Menu/Icon_H.gif);
color: #996666;
}
#foldinglist
{
list-style-image: url(/Images/Menu/Icon_L.gif);
}
</style>
<script language="JavaScript1.2">
document.write("<img style='width:0px;height:0px;' width=0 height=0 src='' id='SetCookieImg' border=0>")
function writeCookie(name,value)
{
SetCookieImg.src = "/Inc/SetCookie.asp?name="+name+"&value="+value;
}
var Ianse_GoMenuID='';
var head="display:''"
img1=new Image()
img1.src="/Images/Menu/Icon_H.gif"
img2=new Image()
img2.src="/Images/Menu/Icon_K.gif"
function change(){
if(!document.all)
return
if (event.srcElement.id=="Ianse_MenuHeader") {
var srcIndex = event.srcElement.sourceIndex
var nested = document.all[srcIndex+1]
if (nested.style.display=="none") {
nested.style.display=''
event.srcElement.style.listStyleImage="url(/Images/Menu/Icon_K.gif)"
}
else {
nested.style.display="none"
event.srcElement.style.listStyleImage="url(/Images/Menu/Icon_H.gif)"
}
}
if (document.all){
var nodelength=foldinglist.length-1
var nodes=new Array(nodelength)
var openones=''
}
for (i=0 ; i <= nodelength ; i++){
if (foldinglist[i].style.display=='')
openones=openones + i + " "
}
writeCookie("IanseSuperMenu",openones);
}
document.onclick=change
//-->
</script>
<script language="JavaScript1.2">
if (Ianse_GoMenuID != ''){
var openresults=Ianse_GoMenuID.split(" ")
for (i=0 ; i < openresults.length ; i++){
foldinglist[openresults[i]].style.display=''
document.all[foldinglist[openresults[i]].sourceIndex - 1].style.listStyleImage="url(/Images/Menu/Icon_K.gif)"
}
}
</script>
</td>
</tr>
<tr>
<td>
</td>
</tr>
</table>
</td>
<td align="center" valign="top">
<br />
<form name="calc">
<table border="3" height="250" width="500" style="border-width: 5px; font-family: '宋体', 'Arial Narrow', 'Times New Roman';
font-size: 9pt; font-color: #000000;">
<tbody>
<tr>
<td height="50">
<table width="500">
<tbody>
<tr>
<td>
</td>
<td align="center">
<input name="display" readonly size="40" value="0" style="color: #000000; font-size: 18px;
height: 30px;">
</td>
</tr>
</tbody>
</table>
</td>
</tr>
<tr>
<td>
<table width="500">
<tbody>
<tr>
<td width="290">
<input name="carry" onclick="inputChangCarry(16)" type="radio">
十六进制
<input checked name="carry" onclick="inputChangCarry(10)" type="radio">
十进制
<input name="carry" onclick="inputChangCarry(8)" type="radio">
八进制
<input name="carry" onclick="inputChangCarry(2)" type="radio">
二进制
</td>
<td width="44">
</td>
<td width="150">
<input checked name="angle" onclick="inputChangAngle('d')" type="radio" value="d">
角度制
<input name="angle" onclick="inputChangAngle('r')" type="radio" value="r">
弧度制
</td>
</tr>
</tbody>
</table>
<table width="500">
<tbody>
<tr>
<td width="170">
<input name="shiftf" onclick="inputshift()" type="checkbox">上档功能
<input name="hypf" onclick="inputshift()" type="checkbox">双曲函数
</td>
<td>
<input name="bracket" readonly size="3" style="background-color: lightgrey">
<input name="memory" readonly size="3" style="background-color: lightgrey">
<input name="operator" readonly size="3" style="background-color: lightgrey">
</td>
<td width="183" align="center">
<input onclick="backspace()" style="color: red" type="button" value="退格">
<input onclick="document.calc.display.value = 0 " style="color: red" type="button"
value="清除">
<input onclick="clearall()" style="color: red" type="button" value="复位 CE">
</td>
</tr>
</tbody>
</table>
<table width="500">
<tbody>
<tr>
<td>
<table>
<tbody>
<tr align="middle">
<td>
<input name="pi" onclick="inputfunction('pi','pi')" style="color: blue; width: 40px;"
type="button" value=" PI ">
</td>
<td>
<input name="e" onclick="inputfunction('e','e')" style="color: blue; width: 40px;"
type="button" value=" E ">
</td>
<td>
<input name="bt" onclick="inputfunction('dms','deg')" style="color: #ff00ff; width: 40px;"
type="button" value="d.ms">
</td>
</tr>
<tr align="middle">
<td>
<input onclick="addbracket()" style="color: #ff00ff; width: 40px;" type="button"
value=" ( ">
</td>
<td>
<input onclick="disbracket()" style="color: #ff00ff; width: 40px;" type="button"
value=" ) ">
</td>
<td>
<input name="ln" onclick="inputfunction('ln','exp')" style="color: #ff00ff; width: 40px;"
type="button" value=" ln ">
</td>
</tr>
<tr align="middle">
<td>
<input name="sin" onclick="inputtrig('sin','arcsin','hypsin','ahypsin')" style="color: #ff00ff;
width: 40px;" type="button" value="sin">
</td>
<td>
<input onclick="operation('^',7)" style="color: #ff00ff; width: 40px;" type="button"
value="x^y">
</td>
<td>
<input name="log" onclick="inputfunction('log','expdec')" style="color: #ff00ff;
width: 40px;" type="button" value="log">
</td>
</tr>
<tr align="middle">
<td>
<input name="cos" onclick="inputtrig('cos','arccos','hypcos','ahypcos')" style="color: #ff00ff;
width: 40px;" type="button" value="cos">
</td>
<td>
<input name="cube" onclick="inputfunction('cube','cubt')" style="color: #ff00ff;
width: 40px;" type="button" value="x^3">
</td>
<td>
<input onclick="inputfunction('!','!')" style="color: #ff00ff; width: 40px;" type="button"
value=" n! ">
</td>
</tr>
<tr align="middle">
<td>
<input name="tan" onclick="inputtrig('tan','arctan','hyptan','ahyptan')" style="color: #ff00ff;
width: 40px;" type="button" value="tan">
</td>
<td>
<input name="sqr" onclick="inputfunction('sqr','sqrt')" style="color: #ff00ff; width: 40px;"
type="button" value="x^2">
</td>
<td>
<input onclick="inputfunction('recip','recip')" style="color: #ff00ff; width: 40px;"
type="button" value="1/x">
</td>
</tr>
</tbody>
</table>
</td>
<td width="30">
</td>
<td>
<table>
<tbody>
<tr>
<td>
<input onclick="putmemory()" style="color: red" type="button" value="储存">
</td>
</tr>
<tr>
<td>
<input onclick="getmemory()" style="color: red" type="button" value="取存">
</td>
</tr>
<tr>
<td>
<input onclick="addmemory()" style="color: red" type="button" value="累存">
</td>
</tr>
<tr>
<td>
<input onclick="multimemory()" style="color: red" type="button" value="积存">
</td>
</tr>
<tr>
<td height="33">
<input onclick="clearmemory()" style="color: red" type="button" value="清存">
</td>
</tr>
</tbody>
</table>
</td>
<td width="30">
</td>
<td>
<table>
<tbody>
<tr align="middle">
<td>
<input name="k7" onclick="inputkey('7')" style="color: blue; width: 40px;" type="button"
value=" 7 ">
</td>
<td>
<input name="k8" onclick="inputkey('8')" style="color: blue; width: 40px;" type="button"
value=" 8 ">
</td>
<td>
<input name="k9" onclick="inputkey('9')" style="color: blue; width: 40px;" type="button"
value=" 9 ">
</td>
<td>
<input onclick="operation('/',6)" style="color: red; width: 40px;" type="button"
value=" / ">
</td>
<td>
<input onclick="operation('%',6)" style="color: red" type="button" value="取余">
</td>
<td>
<input onclick="operation('&',3)" style="color: red" type="button" value=" 与 ">
</td>
</tr>
<tr align="middle">
<td>
<input name="k4" onclick="inputkey('4')" style="color: blue; width: 40px;" type="button"
value=" 4 ">
</td>
<td>
<input name="k5" onclick="inputkey('5')" style="color: blue; width: 40px;" type="button"
value=" 5 ">
</td>
<td>
<input name="k6" onclick="inputkey('6')" style="color: blue; width: 40px;" type="button"
value=" 6 ">
</td>
<td>
<input onclick="operation('*',6)" style="color: red; width: 40px;" type="button"
value=" * ">
</td>
<td>
<input name="floor" onclick="inputfunction('floor','deci')" style="color: red" type="button"
value="取整">
</td>
<td>
<input onclick="operation('|',1)" style="color: red" type="button" value=" 或 ">
</td>
</tr>
<tr align="middle">
<td>
<input onclick="inputkey('1')" style="color: blue; width: 40px;" type="button" value=" 1 ">
</td>
<td>
<input name="k2" onclick="inputkey('2')" style="color: blue; width: 40px;" type="button"
value=" 2 ">
</td>
<td>
<input name="k3" onclick="inputkey('3')" style="color: blue; width: 40px;" type="button"
value=" 3 ">
</td>
<td>
<input onclick="operation('-',5)" style="color: red; width: 40px;" type="button"
value=" - ">
</td>
<td>
<input onclick="operation('<',4)" style="color: red" type="button" value="左移">
</td>
<td>
<input onclick="inputfunction('~','~')" style="color: red" type="button" value=" 非 ">
</td>
</tr>
<tr align="middle">
<td>
<input onclick="inputkey('0')" style="color: blue; width: 40px;" type="button" value=" 0 ">
</td>
<td>
<input onclick="changeSign()" style="color: blue; width: 40px;" type="button" value="+/-">
</td>
<td>
<input name="kp" onclick="inputkey('.')" style="color: blue; width: 40px;" type="button"
value=" . ">
</td>
<td>
<input onclick="operation('+',5)" style="color: red; width: 40px;" type="button"
value=" + ">
</td>
<td>
<input onclick="result()" style="color: red" type="button" value=" ＝ ">
</td>
<td>
<input onclick="operation('x',2)" style="color: red" type="button" value="异或">
</td>
</tr>
<tr align="middle">
<td>
<input disabled name="ka" onclick="inputkey('a')" style="color: blue" type="button"
value=" A ">
</td>
<td>
<input disabled name="kb" onclick="inputkey('b')" style="color: blue" type="button"
value=" B ">
</td>
<td>
<input disabled name="kc" onclick="inputkey('c')" style="color: blue" type="button"
value=" C ">
</td>
<td>
<input disabled name="kd" onclick="inputkey('d')" style="color: blue" type="button"
value=" D ">
</td>
<td>
<input disabled name="ke" onclick="inputkey('e')" style="color: blue" type="button"
value=" E ">
</td>
<td>
<input disabled name="kf" onclick="inputkey('f')" style="color: blue" type="button"
value=" F ">
</td>
</tr>
</tbody>
</table>
</td>
</tr>
</tbody>
</table>
</td>
</tr>
</tbody>
</table>
</form>
<br />
<!-- 计算器表格完 -->
<script language="javascript">
var results = '';
var previouskey = '';
var re = /(//|/*|/+|-)/;
var re2 = /(//|/*|/+|-){2}$/;
var re3 = /.+(//|/*|/+|-).+/;
var re4 = //d|/./;
var re5 = /^[^///*/+].+/d$/;
var re6 = //./;
function calculate(n) {
if (n.match(re4) && previouskey == "=") results = '';
if (result.innerText.match(re3) && n.match(re)) {
if (!results.match(re5)) {
result.innerText = "Error!";
return
}
results = eval(results);
if (results.toString().length >= 12 && results.toString().match(re6))
results = results.toString().substring(0, 12)
result.innerText = results
}
results += n;
if (results.match(re2))
results = results.substring(0, results.length - 2) + results.charAt(results.length - 1)
result.innerText = results
} function calculateresult() {
if (!results.match(re5)) {
result.innerText = "Error!";
return
}
results = eval(results);
if (results.toString().length >= 12 && results.toString().match(re6))
results = results.toString().substring(0, 12)
result.innerText = results
}
function pn() {
if (result.innerText.charAt(0) != '-')
result.innerText = results = '-' + result.innerText;
else if (result.innerText.charAt(0) == '-')
result.innerText = results = result.innerText * (-1)
}
function k3(n, m) {
if (event.keyCode != 13)
return;
a = n.value;
if (a == "") return;
try {
text_32[m].value = eval(a)
} catch (e) {
M("请输入正确的计算式子！")
}
}
dt3 = '在框中输入“计算式子” 然后按“回车键”显示计算结果。'
</script>
</body>
</html>
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