Try like this:
$.post('MAIN Page.aspx', { status: ddl }, function(result) {
alert('success');
});
and on your server:
var status= Request.Form["Status"];
Also you haven't shown what this ddl
javascript variable is and how you assigned it a value but make sure that it is not a complex object but it contains some simple type.
Alternatively if you want to use the $.ajax
method:
$.ajax({
url: 'MAIN Page.aspx',
type: 'POST',
data: { status: ddl },
success: function(result) {
alert('result');
}
});