// Get confirmation
	function getConfirmation (message, url)
	{
		var input = confirm (message);
		
		if (input)
			document.location.href = url;
		else
			return false;
	}
	
	// Create small random overview of galaxy
	function createAvatar (bgcolor, star_color, nb_stars, url)
	{
		var avatar = "";
		
		if (url)
			avatar += "<a href=\"" + url + "\" class=\"avatar\" title=\"Get in this galaxy\">";
		avatar += "<div id=\"avatar\" style=\"background-color: " + bgcolor + "\">";
		for (var i = 0; i < 15; ++i)
		{
			var x = Math.round (Math.random () * 99);
			var y = Math.round (Math.random () * 99);
			
			avatar += "<img src=\"images/empty_pixel.gif\" style=\"position: absolute; top: " + y + "%; left: " + x + "%; background-color: " + star_color + "\" border=\"0\">";
		}
		avatar += "<span class=\"info_stars\">" + nb_stars + " star" + ((nb_stars > 1) ? "s" : "") + "</span>";
		avatar += "</div>";
		if (url)
			avatar += "</a>";
		document.write (avatar);
	}
	
	function setCookie (variable, value)
	{
		var expire = new Date ();
		var year = expire.getTime () + (365 * 24 * 60 * 60 * 1000);
		
		expire.setTime (year);
		document.cookie = variable + "=" + value + "; expires=" + expire.toGMTString() + "; path=/";
	}
	
	function getCookie (variable)
	{
		var variables = document.cookie.split ("; ");
		var expire = new Date ();
		var year = expire.getTime () + (365 * 24 * 60 * 60 * 1000);

		expire.setTime (year);
		for (i = 0; i < variables.length; ++i)
		{
			data = variables[i].split ("=");
			cookie_var = data[0];
			cookie_data = data[1];
			if (cookie_var == variable)
			{
				if (cookie_data)
					return cookie_data;
				return "";
			}
		}
		return "";
	}
	
	function initialize ()
	{
		var mode = getCookie ("icon_mode_galaxies");
		
		if (mode != "")
			toggleGalaxies (mode);
	}
	
	function toggleGalaxies (mode)
	{
		var img_small = document.getElementById ("icon_small_galaxies");
		var img_extended = document.getElementById ("icon_extended_galaxies");
		
		for (i = 0; i < total_galaxies; ++i)
			toggleGalaxy(i, mode);
		img_small.className = (mode == 0) ? "bg_orange" : "bg_light_grey";
		img_extended.className = (mode == 1) ? "bg_orange" : "bg_light_grey";
		setCookie ("icon_mode_galaxies", mode);
	}
	
	function toggleGalaxy(id_galaxy, mode)
	{
		var galaxy = document.getElementById ("galaxy_" + id_galaxy);
		var info = document.getElementById ("galaxy_info_" + id_galaxy);
		
		if (mode == 0)
		{
			galaxy.style.backgroundImage = "url(images/stamp_background.gif)";
			galaxy.style.width = "100px";
			info.style.display = "none";
		}
		else
		{
			galaxy.style.backgroundImage = "url(images/stamp_extended_background.gif)";
			galaxy.style.width = "206px";
			info.style.display = "block";
		}
	}