Cannot get $.post variable in ASP page (but can get in PHP page)

Cannot get $.post variable in ASP page (but can get in PHP page)

Dear All,
 
** Attached with my testing source code : JQuery ver 1.8 **
 
I have a problem of making use of $.post command to pass variable "queryString" to an ASP page for further process.
 
My existing PHP version (Working!!!)
===========================
index.htm >>   $.post("rpc.php", {queryString: ""+inputString+""}, function(data){
This version is working and I can pass the "queryString" value to a PHP page ( rpc.php ), I can get this value by $_POST[queryString] function call (in rpc.php).
 
 
However, when I want to create an ASP version, and I do a simple change
 
index.htm >>   $.post(" rpc.asp", {queryString: ""+inputString+""}, function(data){
I have a problem to use >> request.querystring("queryString") to get the value passing from index.htm, the return is an EMPTY string from request.querystring("queryString"). (in rpc.asp)
 
Can anyone give me hints to resolve the above problem?
 
Millions of thanks!
 
 
Dennis Tsang