codeigniter post method

[eluser]Unknown[/eluser]
I'm working on a simple login form. When the user clicks on the Login button, I want to send the post values to my controller, validate them against my database (using a model) and return a value. Based on that value, I want to either send the user to the member area, or display an error message on my form. This error message has a class 'error' and is hidden by default. I want to use jQuery's show() to show it when the credentials are wrong.

[url="http://powisofficesupplies.ca/"]montreal office supplies[/url]