跪求，哪儿错啦，咋运行不出来啊
<!DOCTYPE html>
<html>
<head>
<title> 事件</title>
<script type="text/javascript">
function count(){
var abb1=document.getElementById("txt1").value;
var abb2=document.getElementById("txt2").value;
var abb3=document.getElementById("select").value;
swith(abb3)
{
case "+":var num3 = parseInt(abb1) + parseInt(abb2);break;
case "-":var num3 = parseInt(abb1) + parseInt(abb2);break;
case "*":var num3 = parseInt(abb1) + parseInt(abb2);break;
case "/":var num3 = parseInt(abb1) + parseInt(abb2);break;
}//获取通过下拉框来选择的值来改变加减乘除的运算法则
document.getElementById("fruit").value = num3;
//设置结果输入框的值
}
</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>
宿宿公主3回答
-
晴天不出门
小错误----onclick="count()" -
guozhchun
<input type='button' value=' = ' onclick=count()/> <!-- onclick 后面加引号：onclick = "count()" -->swith(abb3) // switch 单词写错 { case "+":var num3 = parseInt(abb1) + parseInt(abb2);break; case "-":var num3 = parseInt(abb1) + parseInt(abb2);break; // 表达式中运算符写错 case "*":var num3 = parseInt(abb1) + parseInt(abb2);break; // 表达式中运算符写错 case "/":var num3 = parseInt(abb1) + parseInt(abb2);break; // 表达式中运算符写错，PS：考虑一下除0情况 } -
碎碎的时光
三个小错误
随时随地看视频慕课网APP
相关分类
JavaScript