problem in passing a variable to a function

problem in passing a variable to a function

hi
sorry if this is such a obvious question, but i'm kind of newbie in JQuery,
i am using a lightpop plugin, & i want to pass 'image_path' via  html.
lightpop plugin code is something like this:
  1. (function(jQuery){
        jQuery.browser = jQuery.extend(
            {chrome: /chrome/i.test(navigator.userAgent)} ,
            jQuery.browser
        );

        jQuery.fn.lightpop = function(settings, fileTypes, plugin_name, image_path, pre_image, pre_icon){
            document._write = document.write;

            plugin_name = plugin_name || 'lightpop';
            image_path  = image_path  || 'images/';
            pre_image   = pre_image   || image_path + plugin_name + '-';
            pre_icon    = pre_icon    || image_path + 'icon-';

            settings = jQuery.extend( true, {
                overlayBgColor:        '#000' ,
                overlayOpacity:        0.7 ,
                contentFrameType:    'border' ,
                contentBorder:        'none' ,
                boxBorderSize:        6 ,
                containerBorderSize:    10 ,
                containerResizeSpeed:    'normal' ,
                contentBgColor:        '#FFF' ,
                imageBox:            pre_image + 'box.gif' ,
                imageBorderL:        pre_image + 'border-l.gif' ,
                imageBorderR:        pre_image + 'border-r.gif' ,
                imageLoading:        pre_image + 'ico-loading.gif'


























in my html try these, but none of them didn't work out:
  1.  $('a[href$=.jpg], a[href$=.gif], a[href$=.png]').lightpop(image_path = 'http://localhost/img/');
  2.  $('a[href$=.jpg], a[href$=.gif], a[href$=.png]').lightpop({image_path : 'http://localhost/img/'});