function init_wrmap(i, jq_map) {
	jq_map = $(jq_map);
	var jq_sledruns = jq_map.children();
	jq_sledruns.detach();
	
    // Introduce EPSG:3857 as an alias of the built in EPSG:900913 projection (both are the "Google/OSM" projections)
	var EPSG4326 = new OpenLayers.Projection("EPSG:4326"); // lon/lat 
	var EPSG3857 = new OpenLayers.Projection("EPSG:3857"); // google

	// Create the map
    var map = new OpenLayers.Map(jq_map.context, {
        projection: EPSG3857,
        displayProjection: EPSG4326,
        units: "m",
		theme: null
	});

	// Google Layer
	var layer_map = new OpenLayers.Layer.Google("Google Physical", {
		type: google.maps.MapTypeId.TERRAIN
	});

    // // Alternative: OSM map
    // var layer_map = new OpenLayers.Layer.OSM();
    
    // // Alternative: Microsoft Bing Maps
    // var layer_map = new OpenLayers.Layer.Bing({
    //     type: "Road",
    //     key: "AgPH3SlIXAwajrJKf0FORQyhTqsP8KIlvtN6RKfvxe6fOB6q6-HFmg8EOFm7LSOA"});
	
	// Sledrun layer
	var layer_sledruns = new OpenLayers.Layer.Vector("Rodelbahnen", {
		styleMap: new OpenLayers.StyleMap({
			"default": new OpenLayers.Style({
				externalGraphic: "/vorlagen/gmap_rodelbahn_c.png",
				graphicWidth: 17,
				graphicHeight: 17,
				graphicXOffset: -8,
				graphicYOffset: -8,
				graphicZIndex: 11,
				backgroundGraphic: "/vorlagen/gmap_rodelbahn_c_s.png",
				backgroundWidth: 23,
				backgroundHeight: 23,
				backgroundXOffset: -8,
				backgroundYOffset: -8,
				backgroundZIndex: 12,
				title: "${label}"
			}),
			"highlight": new OpenLayers.Style({
				label: "${label}",
				labelOutlineColor: "white",
				labelYOffset: 12,
				fontWeight: "bold"
			})

		}),
		rendererOptions: {yOrdering: true}
	});
	jq_sledruns.each(function(j, jq_sledrun) {
		jq_sledrun = $(jq_sledrun);
		var lon = parseFloat(jq_sledrun.attr('data-lon'));
		var lat = parseFloat(jq_sledrun.attr('data-lat'));
		var point = new OpenLayers.Geometry.Point(lon, lat).transform(EPSG4326, EPSG3857);
		layer_sledruns.addFeatures([new OpenLayers.Feature.Vector(point, {
			label: jq_sledrun.attr('data-title'),
			url: jq_sledrun.attr('data-url')
		})]);
	});
	map.addControl(new OpenLayers.Control.SelectFeature(layer_sledruns, {
		hover: true,
		highlightOnly: true,
		autoActivate: true,
		renderIntent: "highlight"
	}));
	map.addControl(new OpenLayers.Control.SelectFeature(layer_sledruns, {
		autoActivate: true,
		toggle: true,
		onSelect: function(feature) {
			// Open popup
			var selectFeatureControl = this;
			var popup = new OpenLayers.Popup.FramedCloud("sledruninfopopup_" + feature.attributes['label'], 
			feature.geometry.getBounds().getCenterLonLat(),
			null,
			"<h2>" + feature.attributes['label'] + "</h2>\n" +
			"<ul>\n" + 
			"<li><a href=\"" + feature.attributes['url'] + "\">Details</a></li>\n" +
			"</ul>\n",
			null, true, function(event) {
				// onPopupClose
				selectFeatureControl.unselectAll();
			});
			feature.popup = popup;
			map.addPopup(popup);
		},
		onUnselect: function(feature) {
			// Close popup
			map.removePopup(feature.popup);
			feature.popup.destroy();
			feature.popup = null;
		}
	}));


	// Center map
	map.addLayers([layer_map, layer_sledruns]);
	var lon = parseFloat(jq_map.attr('data-center-lon'));
	var lat = parseFloat(jq_map.attr('data-center-lat'));
	var zoom = parseInt(jq_map.attr('data-zoom'));
	map.setCenter(new OpenLayers.LonLat(lon, lat).transform(EPSG4326, map.getProjectionObject()), zoom);

}


function init_wrmaps() {
	var jq_maps = $('.wrmap'); // all wrmap <div> elements
	jq_maps.each(init_wrmap);
}


$(document).ready(init_wrmaps);