registerarraydeclaration/jquery ajax

[Sarama2030]

hi
Im developing a procedure that should write some client side objects like an array or even enforcing asynchronous postbacks to the server using jquery ajax features.Im new to this and i get some minor errors after trying out the solutins.

for registerarraydeclaration this is what i have:

clientscript.registerarraydeclaration("array name","value")

' here on referencing  the array on the  clientside, javascript throws an error that the array is an undefined object.

For jquery ajax:

$.ajax({
    type:"post",
    url:"webform/method"
     .
     etc
});

    ' this throws an error that an object is expected. i have doenloaded the jquery library and is in my root.

I need some comprehensive help on server postbacks from client. thanks