function getHost(url) {
    return url.match(/:\/\/(.[^/]+)/)[1];
 }
 
function kupuAdvBox(min_width, min_height, url, callback){
    
    var window_width = $(window).width();
    var window_height = $(window).height();
    
    if (min_width > window_width || min_height > window_height){
        return none;
    }
    
    var script = document.createElement("script")
    script.type = "text/javascript";
    if (script.readyState){  //IE
        script.onreadystatechange = function(){
            if (script.readyState == "loaded" ||
                    script.readyState == "complete"){
                script.onreadystatechange = null;
                callback();
            }
        };
    } else {  //Others
        script.onload = function(){
            callback();
        };
    }
    script.src = url;
    document.getElementsByTagName("head")[0].appendChild(script);
}