不知道为什么不能得到计算结果呢，答必粉，求求
<!DOCTYPE html>
<html>
<head>
<title>new document</title>
<script type="text/javascript">
function count()
{
var txt1=parseInt(document.getElement('txt1').value);
var txt2=parseInt(document.getElement('txt2').value);
var select=document.getElement('select').value;
var result='';
switch(select)
{
case '+' : result=txt1+txt2;break;
case '-' : result=txt1-txt2;break;
case '*' : result=txt1*txt2;break;
case '/' : result=txt1/txt2;break;
document.getElement('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>
