ns4=(document.layers)?true:false;
ie4=(document.all)?true:false;
dom=(document.getElementById)?true:false;


if (document.images){

back_of = new Image(30,15);
back_of.src = "./images/back_of.gif";
back_on = new Image(30,15);
back_on.src = "./images/back_on.gif";

down_of = new Image(30,15);
down_of.src = "./images/down_of.gif";
down_on = new Image(30,15);
down_on.src = "./images/down_on.gif";

next_of = new Image(30,15);
next_of.src = "./images/next_of.gif";
next_on = new Image(30,15);
next_on.src = "./images/next_on.gif";

top_of = new Image(30,15);
top_of.src = "./images/top_of.gif";
top_on = new Image(30,15);
top_on.src = "./images/top_on.gif";

}

function Zmien(nazwa,x){
        if (document.images){
                src = eval(nazwa + "_" +x+".src");
                document [nazwa].src = src;
        }

}

function Okno(url, width, height) {
        var Win = window.open('./inc/' + url,"displayWindow",'width=' + width + ',height=' + height + ',resizable=0,scrollbars=yes,menubar=no' );
}