If you want to post some data to some other page using ajax than you can use
Ajax Post method
like below.
$.post("YourPageName.aspx",
{
Parameter1: document.getElementById('hidParameter1').value,
parameter2: document.getElementById('hidParameter2').value,
Parameter3: "Hello"
}
and you can get these paramters in
YourpageName.aspx
by
Request.Form["Parameter1"]
and so on.
Hope it will help. :)