哪里出错了？
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<script type="text/javascript">
function count(){
var txt1 = parseInt(document.getElementById("txt1").value);
var txt2 = parseInt(document.getElementById("txt2").value);
var select1 = document.getElementById("select").value;
var result="";
switch(select1){
case "+":
result = txt1+txt2;
break;
case "-":
result = txt1-txt2;
break;
case "*":
result = txt1*txt2;
break;
default:
result = txt1/txt2;
}
document.getElementById("fruit").value=result
}
</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()/>
<input type='text' id='fruit' />
</body>
</html>
慕粉36461482回答
-
snowmanJS
<input type='button' value=' = ' onclick=count()/> 应改为 <input type='button' value=' = ' onclick="count()" /> -
Caballarii
<input type='button' value=' = ' onclick="count()"/>onclick要加引号
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相关分类
JavaScript