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                        /前端開發
                        
                            /JavaScript
                        
                        /JavaScript進階篇

得不到正確結果

<!DOCTYPE?html>
<html>
?<head>
??<title>?事件</title>??
??<script

type="text/javascript">
???function?count(){
???????var?a=parseInt(document.getElementById('txt1').vaule);
????//獲取第一個輸入框的值
???????var?b=parseInt(document.getElementById('txt2').vaule);
//獲取第二個輸入框的值
???????var?select=document.getElementById('select').vaule;
//獲取選擇框的值
???????var?end=0;
???????switch?(select)
???????{
???????????case?'+':
???????????????end=a+b;
???????????????break;
???????????case?'-':
???????????????end=a-b;
???????????????break;
???????????case?'*':
???????????????end=a*b;
???????????????break;
???????????case?'/':
???????????????end=a/b;
???????????????break;
???????}
//獲取通過下拉框來選擇的值來改變加減乘除的運算法則
????document.getElementById('fruit').vaule=end;
????//設置結果輸入框的值?
????
???}
??</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()"/>?
???//通過?=?按鈕來調用創建的函數，得到結果
???<input?type='text'?id='fruit'?/>???
?</body>
</html>