<!–
p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 24.0px Consolas; color: #2b7ec3}
p.p2 {margin: 0.0px 0.0px 0.0px 0.0px; font: 24.0px Consolas; color: #d74200}
p.p3 {margin: 0.0px 0.0px 0.0px 0.0px; font: 24.0px Consolas; color: #4f5d66}
p.p4 {margin: 0.0px 0.0px 0.0px 0.0px; font: 24.0px Consolas; color: #289c97}
p.p5 {margin: 0.0px 0.0px 0.0px 0.0px; font: 24.0px Consolas; color: #a5b2b9}
p.p6 {margin: 0.0px 0.0px 0.0px 0.0px; font: 24.0px Consolas; color: #4663cc}
p.p7 {margin: 0.0px 0.0px 0.0px 0.0px; font: 24.0px Consolas; color: #060606}
p.p8 {margin: 0.0px 0.0px 0.0px 0.0px; font: 24.0px Consolas; color: #4a8a01}
p.p9 {margin: 0.0px 0.0px 0.0px 0.0px; font: 24.0px Consolas; color: #060606; min-height: 28.0px}
p.p10 {margin: 0.0px 0.0px 0.0px 0.0px; font: 24.0px Consolas; color: #4f5d66; min-height: 28.0px}
span.s1 {color: #4f5d66}
span.s2 {color: #2b7ec3}
span.s3 {color: #48565d}
span.s4 {color: #289c97}
span.s5 {color: #d74200}
span.s6 {color: #060606}
span.s7 {color: #000000}
span.s8 {color: #e48b00}
span.s9 {color: #4663cc}
span.s10 {color: #698906}
span.s11 {color: #4a8a01}
–>
<!DOCTYPE html>
<html>
<head>
<meta charset=”utf-8″>
<title></title>
</head>
<body >
<input type=’text’ id=’txt1′ />
<select id=’select’>
<option value=’+’>+</option>
<option value=”-“>-</option>
<option value=”*”>*</option>
<option value=”/”>/</option>
</select>
<input type=’text’ id=’txt2′ />
<input type=’button’ value=’ = ‘ onclick=”count()”/>
<!–通过 = 按钮来调用创建的函数，得到结果–>
<input type=’text’ id=’fruit’ />
</body>
<script type=”text/javascript”>
//制做简单计算器
function count() {
var txt1 = document.all.txt1.value;
var txt2 = document.all.txt2.value;
var s=document.all.select.value;
var z;
switch(s){
case “+”: z=parseFloat(txt1)+parseFloat(txt2);break;
case “-“:
z=parseFloat(txt1)-parseFloat(txt2);break;
case ”*”:z=parseFloat(txt1)*parseFloat(txt2);break;
case ”/”:z=parseFloat(txt1)/parseFloat(txt2);break;
}
document.getElementById(“fruit”).value=z;
}
</script>
</html>
