var e = jQuery.Event("click"); 
e.user = "foo"; 
e.pass = "bar"; 
$("a").trigger(e);


// or the shortcut
$("a").trigger({ 
    type:"click", 
    user:"username", 
    pass:"password" 
});

http://jquery-howto.blogspot.com/2009/01/working-with-jquery-13-new-event-object.html

JQuery event pass data

jquery

JavaScript