function coolers(nr,w,h,cat,lan) {

var winleft = (screen.width - w) / 2;
var wintop = (screen.height - h) / 2;

var eden=null;
eden=window.open("show.php?cat="+cat+"&lang="+lan+"&nr="+nr+"","cooler","left="+winleft+",top="+wintop+",width="+w+",height="+h+",scrollbars=0");
eden.focus();

}