代碼錯誤了
<!DOCTYPE?html>
<html>
?<head>
??<title>?事件</title>??
??<script?type="text/javascript">
???function?count(){
???????var?txt1=?document.getElementById("txt1").value;
???????var?txt2=?document.getElementById("txt2").value;?
??????var?select1=?document.getElementById("select").value;???
???????var?result="";
???????switch(select1)
???????{
???????????case?"+":
???????????????result=parseFloat(txt1)?+?parseFloat(txt2);
???????????????break;
???????????case?"-":
???????????????result=parseFloat(txt1)?-?parseFloat(txt2);
???????????????break;
?????????????case?"*":
???????????????result=parseFloat(txt1)?*?parseFloat(txt2);
???????????????break;
???????????case?"/":
???????????????result=parseFloat(txt1)?/?parseFloat(txt2);
???????????????break;???
???????????
???????}
??????
????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（）/>?<!--通過?=?按鈕來調用創建的函數，得到結果-->?
???<input?type='text'?id='fruit'?/>???
?</body>
</html>哪里錯了，我找不到
還有代碼錯了要怎么調試，我不會
2015-10-20
這一行括號錯了，改成英文括號即可。改
調試代碼可以看一寫這門課：http://www.xianlaiwan.cn/learn/137