window.onload = function() {
  if (navigator.product=="Gecko" && navigator.userAgent.indexOf("rv:1.7")>=-1) { // blad w Gecko 1.7
    var s=document.body.style;
    s.display="none";
    s.display="";
  }
}

function w_popup(href,h,w)
{
	var ziel = 'popup';
	var xx = (screen.width-w)/2;
	var yy = (screen.height-h)/2;
	if(cx_win = window.open(href,ziel,"left="+xx+",top="+yy+",screenX="+xx+",screenY="+yy+",width="+w+",height="+h+",toolbar=no,status=no,scrollbars=no,resizable=no"))
	{
		cx_win.window.moveTo(xx,yy);
		cx_win.focus();
	}
	else
	{
		return true;	
	}
	return false;
}