<!DOCTYPE?html>
<html>
?<head>
??<title>?事件</title>??
??<script?type="text/javascript">
???function?count()
??{????
????var?num1=parseInt(document.getElementById("txt1").value);
????var?num2=parseInt(document.getElementById("txt2").value);
????var?opp=document.getElementById("select"）.value;
????var?sum='';
????
????switch?(opp)
{
?case?'+':
?sum=num1+num2?;
?break;
?case?"-"
?sum=num1-num2?;
?break;
?case?"*"
?sum=num1*num2?;
?break;
?case?"/"
?sum=num1/num2?;
?break;
}
document.getElementById("fruit"）.value?=?sum;
????
}
??</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>
幫忙看下代碼有什么問題
spider18
2015-09-11 10:10:04
