快递100，ajax请求

<script type="text/javscript:;">
function getquery(){
$.post('url.php' , {ordersn:"5541774441"} , function(rs){
var html = '';
rs = rs.data;
for(var i ; i < data.length; i++){
var result = rs.[i];
html += '<span>'+result.time+'</span><p>'+result.context+'</p >';
}
$("#ins").html(ins);
},'json')
}
$(document).ready(function(){
setTimeout('getquery()',2000);
});
</script>
<div id="ins">

</div>

url.php

<?php
$sn = $_POST['ordersn'];
//参数设置
$post_data = array();
$post_data["customer"] = '*****';
$key= '*****' ;
$post_data["param"] = '{"com":"*****","num":$sn}';

$url='http://poll.kuaidi100.com/poll/query.do';
$post_data["sign"] = md5($post_data["param"].$key.$post_data["customer"]);
$post_data["sign"] = strtoupper($post_data["sign"]);
$o="";
foreach ($post_data as $k=>$v)
{
$o.= "$k=".urlencode($v)."&"; //默认UTF-8编码格式
}
$post_data=substr($o,0,-1);
$ch = curl_init();
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_URL,$url);
curl_setopt($ch, CURLOPT_POSTFIELDS, $post_data);
$result = curl_exec($ch);
$data = str_replace(""",'"',$result );
echo $data = json_decode($data,true);exit();

?>