Trent Richardson's Impromptu website
js-hotkeys

<script src="http://www.google.com/jsapi"></script>  
<script>  
     // Load jQuery  
     google.load("jquery", "1.3.2");  
</script>
<script src="insum/r/files/static/v2Y/jquery-impromptu.2.3.js"></script>
<script src="insum/r/files/static/v2Y/jquery.hotkeys-0.7.8.js"></script>
<script>
    function validate_items() {
        $('#P57_ITEM_01').each(function(){
            var l_item = $(this);
            // send request
            $.ajax({
                type: "POST",
                url:  "wwv_flow.show",
                data: {x01:l_item.attr("id")
                      ,x02:l_item.val()
                      ,p_widget_name:"validate"
                      ,p_widget_mod:"mandatory"
                      ,p_widget_action:"alert"
                      ,p_flow_id:$('#pFlowId').val()
                      ,p_flow_step_id:$('#pFlowStepId').val()
                      ,p_instance:$('#pInstance').val()
                      ,p_request:"APPLICATION_PROCESS=WIDGET"
                },
                dataType: "json",
                success: function(data, textStatus){
                    if (data[0].error != "") {
                        //Prompt the user with the alert message
                        $.prompt(data[0].message
                                ,{loaded:   function(){
                                                //bind keyboard shortcut for the OK button
                                                $(document).bind('keypress','o',function(){$('#jqi_state0_buttonOk').trigger('click');});
                                            }
                                 ,callback: function(){
                                                //unbind keyboard shortcut for the OK button
                                                $(document).unbind('keypress','o',function(){$('#jqi_state0_buttonOk').trigger('click');});
                                            }
                                 }
                        );
                    }
                }
            });
            
        });
    }
</script>

DECLARE
    l_error     VARCHAR2(255);
    l_message   VARCHAR2(255);
BEGIN
    /* wwv_flow.g_widget_name */
    CASE wwv_flow.g_widget_name
        WHEN 'validate' THEN
            
            /* wwv_flow.g_widget_mod */
            CASE wwv_flow.g_widget_mod
                WHEN 'mandatory' THEN
                    
                    IF wwv_flow.g_x02 is null THEN
                        /* wwv_flow.g_widget_name */
                        CASE wwv_flow.g_widget_action
                            WHEN 'alert' THEN
                                l_error     := 'MANDADORY';
                                l_message   := 'Please enter a value.';
                            ELSE
                                --LOG ERROR
                                null;
                        END CASE;
                    END IF;
                    
                ELSE
                    null;
            END CASE;
            
        ELSE
            null;
    END CASE;
    
    htp.prn('[{''error'':'''||l_error||''',''message'':'''||l_message||'''}]');
    
END;