Change KML file dynamically via javascript

Hi,

I’m looking for a solution to change / load a KML file dynamically via javascript.
I used to do it with Google Map and this simple code:

function mapRedraw(idmap,url) {
    if(jQuery("body").data(idmap) != url) {
        var kml="/maps/" + url + "?v="+(new Date()).getTime(),
        f = new FlexibleMap();
        f.dblclickZoom=false;
        f.scrollwheel=true;
        f.mapTypeControl=false;
        f.zoomControl = false;
        f.showKML(idmap, kml);
                jQuery("body").data(idmap,url);
    }
}

jQuery(window).ready(function() {
    jQuery(".map-link").click( function(e){
        e.preventDefault();
        var kml_link = jQuery(this).data("url"),
        kml_map = jQuery(this).data("map"),
        kml_type = jQuery(this).data("type"),
        kml_lang = "_" + jQuery(this).data("lang");
        if(kml_type == undefined) kml_type="kml";
        if(kml_lang == '_undefined') kml_lang="_en";

        var link = kml_link + kml_lang + "." + kml_type;
        mapRedraw(kml_map,link);
                });
    });

But I’m stuck with OSM :/
Any help appreciated.