Php-php's jquery asynchronous request problem!

PHP asynchronous jquery

This is json.html.

function _getdata ()
{
var sid=$ ("#sid"). Val (); JQ gets the value entered by the user
$.ajax (
{
Type: "POST",
URL: "json.php",
data:{"stu_id": Sid},
Cache:false,
DataType: "JSON",
Success:function (MSN)
{
var content= "



"; $.each (Msn,function (i) {content+= " "; } ); content+= "

Id	Name	Professional	Phone	School Number
"+msn[i][0]+"	"+msn[i][1]+"	"+msn[i][2]+"	"+msn[i][3]+"	"+msn[i][4]+"

";
$ ("#test"). HTML (content);
}
});
}


This is json.php.
$sid =$_post["Sid"];
Include ' comm.php '; Connecting to a database
$sql = "Select * from Stu where stu_id={$sid}";
$result = mysql_query ($sql);
while ($row = Mysql_fetch_array ($result)) {
$arr [] = $row;
}
echo Json_encode ($arr);

    输入的数据不能通过ajax传到php页面处理！

