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                        /JavaScript進階篇

求大佬幫忙，顯示不出來結果啊啊啊

<!DOCTYPE?html>
<html>
?<head>
??<title>?事件</title>??
??<script?type="text/javascript">
???function?count(){
????var?v1?=?document.getElementById?("txt1").value;
????var?v2?=?document.getElementById?("txt2").value;
????var?v3?=?document.getElementById?("select").value;
var?result?=?"";
????switch(v3){
????????case?"+":
????????????result?=?parseInt(v1)+parseInt(v2)；
????????????break;
????????case?"-":
????????????result?=?parseInt(v1)-parseInt(v2)；
????????????break;
????????case?"*":
????????????result?=?parseInt(v1)*parseInt(v2)；
????????????break;
????????default:
????????????result?=?parseInt(v1)/parseInt(v2)；
????}
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>

請問這哪里有錯??？？？為什么就是沒有反應呢？Hbuilder報錯的時候說：[Web瀏覽器] "Uncaught SyntaxError: Unexpected token ILLEGAL"?? ?/js測試/new_file.html (13)