<html>
<head>
⋯⋯<script language="javascript">
/* 加法函数 */
function add(){
var num1, num2;
document.myform.txtNum1.value
num1=parseFloat(document.myform.txtNum1.value);
num2=parseFloat(document.myform.txtNum2.value);
document.myform.txtResult.value = num1 + num2;
}
/* 减法函数 */
function subtration(){
var num1,num2;
num1=parseFloat(document.myform.txtNum1.value);
num2=parseFloat(document.myform.txtNum2.value);
document.myform.txtResult.value=num1 - num2;
}
/* 乘法函数 */
function multiplication(){
var num1,num2;
num1=parseFloat(document.myform.txtNum1.value);
num2=parseFloat(document.myform.txtNum2.value);
document.myform.txtResult.value=num1 * num2;
}
/* 除法函数 */
function division(){
var num1, num2;
num1=parseFloat(document.myform.txtNum1.value);
num2=parseFloat(document.myform.txtNum2.value);
document.myform.txtResult.value=num1 / num2;
}
</script>
</head>
<body>
<form action="" method="post" name="myform" id="myform">
</script>
1.加法<br />
2.減法<br />
3.乘法<br />
4.除法<br />
<br />
計算機 <br />
第一個數 : <input name="txtNum1" type="text" id="txtNum1"
size="25"><br />
第二個數 :<input name="txtNum2" type="text" id="txtNum2"
size="25"><br />
<input name="addButton2" type="button" id="addButton2"
value=" + " onclick="add()">
<!-- 减法按钮 -->
<input name="subButton2" type="button" id="subButton2"
value=" - " onclick="subtration()">
<!-- 乘法按钮 -->
<input name="mulButton2" type="button" id="mulButton2"
value=" × " onclick="multiplication()">
<!-- 除法按钮 -->
<input name="divButton2" type="button" id="divButton2"
value=" ÷ " onclick="division()">
<br />
計算結果 :<input name="txtResult" type="text"
id="txtResult" size="25">
</form>
</body>
</html>