<!DOCTYPE html>
<html>
<head>
<title> 事件</title>
<script type="text/javascript">
function count() {
//获取第一个输入框的值
var text1 = document.getElementById("text1").value;
alert('1');
//获取第二个输入框的值
var text2 = document.getElementById("text2").value;
//获取选择框的值
var sel = document.getElementById("select").value;
switch (sel) {
case "+":
document.getElementById("fruit").value = text1 * 1 + text2 * 1;
case "-":
document.getElementById("fruit").value = text1 * 1 - text2 * 1;
case "*":
document.getElementById("fruit").value = text1 * 1 + (text2 * 1);
case "/":
document.getElementById("fruit").value = text1 * 1 + (text2 * 1);
}
}
</script>
</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>
</html>
落叶1111
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