var timeout = setTimeout("timeinsite()",700);

function timeinsite() {
	popraw();
	var timeout = setTimeout("timeinsite()",500);
}

function whatis(){
	if (document.body.offsetWidth) { 
		var mainwidth1 = document.body.offsetWidth;
		return mainwidth1;
	} else {
		var mainwidth1 = window.innerWidth;
		return mainwidth1;
	}
}

function popraw() {
	var mainwidth = whatis();
	var validwidth = (mainwidth - 711) / 2;
	var okrogly = Math.round(validwidth) - 1;
	var backwidth = 760 + okrogly;
	if ( backwidth < 745 ) { backwidth = 745; }
	document.getElementById("backtile").style.width = backwidth + "px";
}

function otworz_mape() {
	var fwidth=760;
	var fheight=577;
	
	var nalewo=Math.round((screen.width/2)-(fwidth/2));
	var natop=Math.round((screen.height/2)-(fheight/2));
	
	open("/mapa.html","Gdzie można nas znaleźć?", "top="+natop+",left="+nalewo+",toolbar=no,menubar=no,location=no,scrollbars=no,status=no,width="+fwidth+",height="+fheight+",resizable=no")
}