<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Untitled Page</title>
<script type="text/javascript" src="jquery-3.2.1.js"></script>
<script type="text/javascript">
$(function(){
$("#btn").click(function(){
$.ajax({
type:'',
url:'',
async: ,
dataType:'',
data:{},
timeout:{},
success:function(data){
alert(data)
}
})
})
})
</script>
</head>
<body>
<input type="button" id="btn" value="click">
<div id="show"></div>
</body>
</html>
</body>
</html>
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