这段代码!运行得出的计算结果错误!请大虾帮看下
<html>
<head>
<title>计算器</title>
<Style type="text/css">
.textBaroder
{
border-width:1px;
border-style:solid
}
</Style>
<script language="javascript">
function compute(op)
{
var num1,num2
num1=parseFloat(document.myform.txtNum1.value)
num2=parseFloat(document.myform.txtNum1.value)
if(op=="+")
document.myform.txtResult.value=num1+num2;
if(op=="-")
document.myform.txtResult.value=num1-num2;
if(op=="*")
document.myform.txtResult.value=num1*num2;
if(op=="/" && num2!=0)
document.myform.txtResult.value=num1/num2;
}
</script>
</head>
<body>
<img scr="taobao1.jpg" width="240" height="31">欢迎您来淘宝!
<form action="" method="post" name="myform" id="myform">
<TABLE border="0" bgcolor="#C9E495" align="center">
<TR><TD colspan="4"><H3><IMG src="images/taobao1.jpg" width="54" height="54">
购物简易计算器<H3></TD>
</TR>
<TR>
<TD>第一个数</TD>
<TD colspan="3"><INPUT name="txtNum1" type="text" class="textBaroder" id="txtNum1"
size="25"></TD>
</TR>
<TR>
<TD>第二个数</TD>
<TD colspan="3"><INPUT name="txtNum2" type="text"
class="textBaroder" id="txtNum2" size="25"></TD>
</TR>
<TR>
<TD><INPUT name="addButton2" type="button" id="addButton2"
value="+" onClick="compute('+')"></TD>
<TD><INPUT name="subButton2" type="button" id="subButton2"
value="-" onClick="compute('-')"></TD>
<TD><INPUT name="mulButton2" type="button" id="mulButton2"
value="x" onClick="compute('*')"></TD>
<TD><INPUT name="divButton2" type="button" id="divButton2"
value="/" onClick="compute('/')"></TD>
</TR>
<TD>计算结果</TD>
<TD colspan="3"><INPUT name="txtResult" type="text"
class="textBaroder" id="txtResult" size="25"></TD>
</TR>
</TABLE>
</form>
</body>
</html>
<html>
<head>
<title>计算器</title>
<Style type="text/css">
.textBaroder
{
border-width:1px;
border-style:solid
}
</Style>
<script language="javascript">
function compute(op)
{
var num1,num2
num1=parseFloat(document.myform.txtNum1.value)
num2=parseFloat(document.myform.txtNum1.value)
if(op=="+")
document.myform.txtResult.value=num1+num2;
if(op=="-")
document.myform.txtResult.value=num1-num2;
if(op=="*")
document.myform.txtResult.value=num1*num2;
if(op=="/" && num2!=0)
document.myform.txtResult.value=num1/num2;
}
</script>
</head>
<body>
<img scr="taobao1.jpg" width="240" height="31">欢迎您来淘宝!
<form action="" method="post" name="myform" id="myform">
<TABLE border="0" bgcolor="#C9E495" align="center">
<TR><TD colspan="4"><H3><IMG src="images/taobao1.jpg" width="54" height="54">
购物简易计算器<H3></TD>
</TR>
<TR>
<TD>第一个数</TD>
<TD colspan="3"><INPUT name="txtNum1" type="text" class="textBaroder" id="txtNum1"
size="25"></TD>
</TR>
<TR>
<TD>第二个数</TD>
<TD colspan="3"><INPUT name="txtNum2" type="text"
class="textBaroder" id="txtNum2" size="25"></TD>
</TR>
<TR>
<TD><INPUT name="addButton2" type="button" id="addButton2"
value="+" onClick="compute('+')"></TD>
<TD><INPUT name="subButton2" type="button" id="subButton2"
value="-" onClick="compute('-')"></TD>
<TD><INPUT name="mulButton2" type="button" id="mulButton2"
value="x" onClick="compute('*')"></TD>
<TD><INPUT name="divButton2" type="button" id="divButton2"
value="/" onClick="compute('/')"></TD>
</TR>
<TD>计算结果</TD>
<TD colspan="3"><INPUT name="txtResult" type="text"
class="textBaroder" id="txtResult" size="25"></TD>
</TR>
</TABLE>
</form>
</body>
</html>
<head>
<title>计算器</title>
<Style type="text/css">
.textBaroder
{
border-width:1px;
border-style:solid
}
</Style>
<script language="javascript">
function compute(op)
{
var num1,num2
num1=parseFloat(document.myform.txtNum1.value)
num2=parseFloat(document.myform.txtNum1.value)
if(op=="+")
document.myform.txtResult.value=num1+num2;
if(op=="-")
document.myform.txtResult.value=num1-num2;
if(op=="*")
document.myform.txtResult.value=num1*num2;
if(op=="/" && num2!=0)
document.myform.txtResult.value=num1/num2;
}
</script>
</head>
<body>
<img scr="taobao1.jpg" width="240" height="31">欢迎您来淘宝!
<form action="" method="post" name="myform" id="myform">
<TABLE border="0" bgcolor="#C9E495" align="center">
<TR><TD colspan="4"><H3><IMG src="images/taobao1.jpg" width="54" height="54">
购物简易计算器<H3></TD>
</TR>
<TR>
<TD>第一个数</TD>
<TD colspan="3"><INPUT name="txtNum1" type="text" class="textBaroder" id="txtNum1"
size="25"></TD>
</TR>
<TR>
<TD>第二个数</TD>
<TD colspan="3"><INPUT name="txtNum2" type="text"
class="textBaroder" id="txtNum2" size="25"></TD>
</TR>
<TR>
<TD><INPUT name="addButton2" type="button" id="addButton2"
value="+" onClick="compute('+')"></TD>
<TD><INPUT name="subButton2" type="button" id="subButton2"
value="-" onClick="compute('-')"></TD>
<TD><INPUT name="mulButton2" type="button" id="mulButton2"
value="x" onClick="compute('*')"></TD>
<TD><INPUT name="divButton2" type="button" id="divButton2"
value="/" onClick="compute('/')"></TD>
</TR>
<TD>计算结果</TD>
<TD colspan="3"><INPUT name="txtResult" type="text"
class="textBaroder" id="txtResult" size="25"></TD>
</TR>
</TABLE>
</form>
</body>
</html>
num1=parseFloat(document.myform.txtNum1.value)
num2=parseFloat(document.myform.txtNum2.value)
这段代码!运行得出的计算结果错误!请大虾帮看下
<html>
<head>
<title>计算器</title>
<Style type="text/css">
.textBaroder
{
border-width:1px;
border-style:solid
}
</Style>
<script language="javascript">
function $(id){return document.getElementById(id);}
function compute(op){
if($('txtNum1').value==''||$('txtNum2').value==''){alert('先填写数字!'); return;}
var num1=0,num2=0,r=0
num1=$('txtNum1').value*1
num2=$('txtNum2').value*1
switch(op){
case "+": r=num1+num2; break;
case "-": r=num1-num2; break;
case "*": r=num1*num2; break;
case "/": r=num1/num2; break;
defult: r=0;
}
$('txtResult').value=r.toString();
}
</script>
</head>
<body>
<img scr="taobao1.jpg" width="240" height="31">欢迎您来淘宝!
<form action="" method="post" name="myform" id="myform">
<TABLE border="0" bgcolor="#C9E495" align="center">
<TR><TD colspan="4"><H3><IMG src="images/taobao1.jpg" width="54" height="54">
购物简易计算器<H3></TD>
</TR>
<TR>
<TD>第一个数</TD>
<TD colspan="3"><INPUT id="txtNum1" type="text" class="textBaroder" id="txtNum1"
size="25"></TD>
</TR>
<TR>
<TD>第二个数</TD>
<TD colspan="3"><INPUT id="txtNum2" type="text"
class="textBaroder" id="txtNum2" size="25"></TD>
</TR>
<TR>
<TD><INPUT name="addButton2" type="button" id="addButton2" value="+" onClick="compute('+')"></TD>
<TD><INPUT name="subButton2" type="button" id="subButton2" value="-" onClick="compute('-')"></TD>
<TD><INPUT name="mulButton2" type="button" id="mulButton2" value="x" onClick="compute('*')"></TD>
<TD><INPUT name="divButton2" type="button" id="divButton2" value="/" onClick="compute('/')"></TD>
</TR>
<TD>计算结果</TD>
<TD colspan="3"><INPUT id="txtResult" type="text"
class="textBaroder" id="txtResult" size="25"></TD>
</TR>
</TABLE>
</form>
</body>
</html>