小弟用javascript設定迴圈10萬，每跑一圈執行一次ajax，然後迴傳圈數到網頁上，但每次都跑不到1萬筆就會停下來，是為什麼呢?以下附上程式碼

js
$("#submit_btn").click(function(){
	
	var frequency = 50000;
	for(i = 0; i<frequency; i++){
		$.ajax({
			url:'ajax.php?action=encryption',
			type:'GET',
			dataType:'JSON',
			success:function(data){
				$("#aid").prepend(data.count+"<br>");
			},function(error){
				$("#aid").append("error<br>");
			}
		
		})
	}
})






html
<input type="button" id="submit_btn" value="開始運算加密"/> 
<br/>
<a id="aid"></a>






php
if(isset($_GET['action']) && $_GET['action'] == "encryption"){

	$query = "insert register_test (count) values ('1')";
	mysqli_query($con,$query) or die ("error");
	
	$query_count = "select * from register_test";
	$result_count = mysqli_query($con,$query_count) or die("error2");
	$count = mysqli_num_rows($result_count);
	$json = array(
				'count' => $count,
			);
	echo json_encode($json);
}