function initialize(lat,lon,show_tab) {
  	if (GBrowserIsCompatible()) {
    	var map = new GMap2(document.getElementById("map_canvas"));
			map.addControl(new GSmallMapControl());
    	map.setCenter(new GLatLng(lat,lon), 15);
          if(show_tab=='1'){
			var infoTabs = [
		  	new GInfoWindowTab("Contact", "<img src='http://www.expressmedicals.co.uk/images/general/logo-bubble.jpg'><br /><br /><span style=\"color:#333\"> Tel: +44 (0)115 955 2211<br /> Fax: +44 (0)115 955 2201<br /> Email: info@potterclarkson.com</span>"), 
		  	new GInfoWindowTab("Address", "<span style=\"color:#333\"> <strong>Potter Clarkson LLP</strong><br /><br />58 The Ropewalk<br />Nottingham<br />NG1 5DD</span>") 
			];
          }
			var marker = new GMarker(map.getCenter());
			GEvent.addListener(marker, "click", function() {
				marker.openInfoWindowTabsHtml(infoTabs);
			});
			map.addOverlay(marker);
            
            if(show_tab=='1'){
			marker.openInfoWindowTabsHtml(infoTabs);
            }
  	}
  }