<!DOCTYPE?html>
<html>
?<head>
??<title>事件</title>??
??<script?type="text/javascript">
???function?count(){
????var?num1=parseFloat(document.getElementById("txt1").value);??
????var?num2=parseFloat(document.getElementById("txt2").value);?
????var?f=document.getElementById("select").value;
????var?result="?";
????swith(f){
????????case?"+":
????????????result=num1+num2;
????????????break;
????????case?"-":
????????????result=num1-num2;
????????????break;
????????case?"*":
????????????result=num1*num2;
????????????break;
????????default:
????????????result=num1/num2;
????????????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()"/>?
???<input?type='text'?id='fruit'?/>???
?</body>
</html>
2015-10-13
switch(f){}//這個拼錯了2015-10-13
switch寫成了swith