Jquery Database Query and handling output.

[eluser]jblack199[/eluser]
So first thing I need to know is how to structure my query to basically like like this:

$query = "SELECT * FROM users WHERE email = '".$_POST['email']."' AND password LIKE BINARY MD5('".$_POST['password']."') AND usergroup = '3' AND status = '1'";

Then handling the output being that its done with jquery.... if there are errors, I need to figure out how to tell JS there are errors and what they are or if there arent errors so it can automatically redirect to the inside admin panel...

Only thing I can think of there, is if there are errors (form validation errors, username/password combo errors, or even not the proper usergroup or status) i'd need to echo out the word 'error' for JS, then requery another function just to obtain the list of errors.. and thats the best i can come up with.