function displayWindow(url, width, height) {
        var Win = window.open(url,"displayWindow",'width=' + width + ',height=' + height + ',resizable=yes,scrollbars=yes,menubar=no' );
}
//Odnośnik w postaci:
//<a 
//href="javascript:displayWindow('extra/ex1.html',600,300)">fgsgs</a>