[jQuery] jq 1.3.2 in IE6 syntax error line 324

[viperasi]

Either jquery-1.2.3.js or jquery-1.3.2.min.js, i got the error in
IE6,other browsers without error.
the code:

$(function(){
        $('#username').keydown(function(event){
                if(event.keyCode==13){
                        formLogin();
                }
        });
        $('#password').keydown(function(event){
                if(event.keyCode==13){
                        formLogin();
                }
        });
        $('#valicode').keydown(function(event){
                if(event.keyCode==13){
                        formLogin();
                }
        });
});

Can anyway help me please? I think it's something really simple and
I'm just being stupid.

Many thanks for reading and sorry for my poor English.