[jQuery] plugin good structure with params

[Imre Farkas]

I have my function

(function($) {
        jQuery.fn.progresbar = function(procent_val,manual) {
                var non_dinamic=manual;
                var procent=procent_val;
                if (non_dinamic==false)
                {
                        var auto_refresh = setInterval(
                                function()
                                {
                                        var current = new Date();
                                        var current_time=current.getTime();
                                        var time_max=(end_time-start_time);
                                        var 
time_elapsed=(current_time-start_time);

                                        var 
procent_to_calculate=(time_elapsed*100)/time_max;
                                        var 
procent=procent_to_calculate.toFixed(0);
                                        if (current_time>end_time)
                                                procent=100;

                                        var 
new_top=parseInt(((100-procent)*progresbar_height)/100);
                                        
$("#progresbar-bar").css('top',new_top+'px');
                                        
$("#procent").css('top',new_top-10+'px');
                                        var 
new_height=parseInt((procent*progresbar_height)/100);
                                        $("#progresbar-bar").height(new_height);
                                        
$("#procent").html(procent+"<span>%</span>");
                                        $("#progresbar-bar").show();
                                        $("#procent").show();
                                }
                        , 1000);
                }
                else
                {
                        var 
new_top=parseInt(((100-procent)*progresbar_height)/100);
                        $("#progresbar-bar").css('top',new_top+'px');
                        $("#procent").css('top',new_top-10+'px');
                        var 
new_height=parseInt((procent*progresbar_height)/100);
                        $("#progresbar-bar").height(new_height);
                        $("#procent").html(procent+"<span>%</span>");
                        $("#progresbar-bar").show();
                        $("#procent").show();
                }
        };
})(jQuery);


Now when i call  i do it so

<script type="text/javascript">
$(document).ready(function() {
        $("#progresbar-bar").hide();
        $("#procent").hide();
        $("#progresbar-bar").progresbar(procent=0,manual=false);
});
</script>

My question: how can i make this to be a good writed structured
plugin, and to call like


<script type="text/javascript">
$(document).ready(function() {
        $("#progresbar-bar").hide();
        $("#procent").hide();
        $("#progresbar-bar").progresbar({
               procent:0,
               manual:false)};
</script>