//Kardos Labor (c) 2010, by Nagy Gábor
function rolunk_bovebb() {
     bovebb = document.getElementById("rolunkbovitett");
     if (bovebb.style.display == "block") {
       	bovebb.style.display = "none";
     } else {
        bovebb.style.display = "block";
     }
}

function rotate_banner(){
	ajaxpage('banner_random.php', 'hirek');
	setTimeout("rotate_banner()",5000)

}
function kollektormeretezes (a,b,c) {
				var d;
				var e;
				var s;
				var f;
				d=(((b*c)/859.8)/(a*0.75))
				e=d/0.08
				s=e;
				f =Math.round(s);
				return f;
}