[jQuery] Selecting a value with up down keys

[jQuery] Selecting a value with up down keys

Hi,
I'm trying to figure out how to select a value from a list that is
filled dynamically using ajax
auto suggest
.
Take a look at the small code:
when typing in a name by the keyboard this function is called:
function lookup
inputString,a
{
        if
inputString.length == 0
{
            // Hide the suggestion box.
            $
'#suggestions'
.hide
;
        } else {
            $.post
"autoComplete/rpc.php", {queryString: ""
inputString
""} ,
function
data
{
                if
data.length >1
{
                    $
'#suggestions'
.show
;
                    $
'#autoSuggestionsList'
.html
data
;
                }
            }
;
        }
    }
An when choosing a value from the given back values list $
'#autoSuggestionsList'
.html
data
; then the next function does his
work:
    function fill
thisValue
{
        $
'#inputString'
.val
thisValue
;
        $
'#suggestions'
.fadeOut
"slow"
    }
But now i want to use the up and down keyboard keys to get to the next
value and choose it by enter.
I wonder if there is a simple jquery solution for this?
thank you for your help in advance :
regards
m.sirin