function checkPostCode (toCheck) {

  // Permitted letters depend upon their position in the postcode.
  var alpha1 = "[abcdefghijklmnoprstuwyz]";                       // Character 1
  var alpha2 = "[abcdefghklmnopqrstuvwxy]";                       // Character 2
  var alpha3 = "[abcdefghjkstuw]";                                // Character 3
  var alpha4 = "[abehmnprvwxy]";                                  // Character 4
  var alpha5 = "[abdefghjlnpqrstuwxyz]";                          // Character 5
  

  // Array holds the regular expressions for the valid postcodes
  var pcexp = new Array ();

  // Expression for postcodes: AN NAA, ANN NAA, AAN NAA, and AANN NAA
  pcexp.push (new RegExp ("^(" + alpha1 + "{1}" + alpha2 + "?[0-9]{1,2})(\\s*)([0-9]{1}" + alpha5 + "{2})$","i"));
  
  // Expression for postcodes: ANA NAA
  pcexp.push (new RegExp ("^(" + alpha1 + "{1}[0-9]{1}" + alpha3 + "{1})(\\s*)([0-9]{1}" + alpha5 + "{2})$","i"));

  // Expression for postcodes: AANA  NAA
  pcexp.push (new RegExp ("^(" + alpha1 + "{1}" + alpha2 + "?[0-9]{1}" + alpha4 +"{1})(\\s*)([0-9]{1}" + alpha5 + "{2})$","i"));
  
  // Exception for the special postcode GIR 0AA
  pcexp.push (/^(GIR)(\s*)(0AA)$/i);
  
  // Standard BFPO numbers
  pcexp.push (/^(bfpo)(\s*)([0-9]{1,4})$/i);
  
  // c/o BFPO numbers
  pcexp.push (/^(bfpo)(\s*)(c\/o\s*[0-9]{1,3})$/i);

  // Load up the string to check
  var postCode = toCheck;

  // Assume we're not going to find a valid postcode
  var valid = false;
  
  // Check the string against the types of post codes
  for ( var i=0; i<pcexp.length; i++) {
    if (pcexp[i].test(postCode)) {
    
      // The post code is valid - split the post code into component parts
      pcexp[i].exec(postCode);
      
      // Copy it back into the original string, converting it to uppercase and
      // inserting a space between the inward and outward codes
      postCode = RegExp.$1.toUpperCase() + " " + RegExp.$3.toUpperCase();
      
      // If it is a BFPO c/o type postcode, tidy up the "c/o" part
      postCode = postCode.replace (/C\/O\s*/,"c/o ");
      
      // Load new postcode back into the form element
      valid = true;
      // Remember that we have found that the code is valid and break from loop
      break;
    }
  }
  
  // Return with either the reformatted valid postcode or the original invalid 
  // postcode
  if (valid) {return postCode;} else return false;
}


if (GBrowserIsCompatible()) {

	var map;	
    var marker;
   	var geo;
	var gmarkers = [];
    var reasons=[];


	function toggle_logo(elementId) {
		var source = document.getElementById(elementId);

		//Terms of use link
		var divs = source.getElementsByTagName('div');
		var current = (divs[14].style.display == 'none') ? 'block' : 'none';
		divs[14].style.display = current;

		//Google Logo link
		/*var links = source.getElementsByTagName('a');
		var current = (links[1].style.display == 'none') ? 'block' : 'none';
		links[1].style.display = current;*/
	}


      function place(lat,lng) {
        var point = new GLatLng(lat,lng);
        map.setCenter(point); 
	 	marker.setPoint(point);		    
		document.getElementById('lat').value = lat;
		document.getElementById('lng').value = lng;
      }



      // ====== Geocoding ======
      function showAddress() {
      
		var dd = document.getElementById('country_id').selectedIndex;
		var ss = document.getElementById('country_id')[dd].text; 
      	var search1 = '';

        search1 = ss;
        var region = document.getElementById('region_name').value;
      	if( region!=''){
        	search1 = search1+", "+region;
        }
        var city = document.getElementById('city_name').value;
      	if( city!=''){
        	search1 = search1+", "+city;
        }

        var postcode = document.getElementById('postcode').value;
      	if( postcode!=''){
        	search1 = search1+", "+postcode;
        }


        
        var s = search1;

        // ====== Perform the Geocoding ======        
        geo.getLocations(s, function (result)
          {
            if (result.Status.code == G_GEO_SUCCESS) {
              if (result.Placemark.length > 1) { 
                // Loop through the results
                for (var i=0; i<result.Placemark.length; i++) {
                  var p = result.Placemark[i].Point.coordinates;
                }
              }
              // ===== If there was a single marker =====
              else {
                var p = result.Placemark[0].Point.coordinates;
                place(p[1],p[0]);
              }
            }
          }
        );
      }



   function createMarker_view(point, id, name, country_name, region_name, city_name, category_name, parent_category_name, image, url) {

		var imageadd = '';
	  	if(image!=''){
	  		imageadd = "<a href=\'"+url+"\'><img src='"+ image +"' border='0' style='margin:5px 2px 10px 2px; text-align:left;'></a><br />";
        }
        var category = '';
		if(parent_category_name!=category_name){
        	category = parent_category_name+" -> "+category_name;
        }else{
        	category = category_name;
        }
        
      	var html = "<div style='vertical-align:top; text-align:left; font-size:11px; padding:0px 10px 0px 0px; margin:0px 0px 0px 0px; min-height:150px;'><h3 style=\'color: #85C327; margin:2px 0px 4px 0px;\'>"+name+"</h3>"+imageadd+"<b>Location:</b> "+country_name+" -> "+region_name+" -> "+city_name+"<br /><br /><b>Category:</b> "+category+"<br /><br /><a href=\'"+url+"\'>view vouchers</a><br /><br /></div>";

        
      	var marker = new GMarker(point);	  
     	marker.myname = id;        
        
        GEvent.addListener(marker, "click", function() {
          marker.openInfoWindowHtml(html);
        });

		
        gmarkers.push(marker);        
        map.addOverlay(marker);        
	}


	function initialize_vouchers_map() {
		map = new GMap2(document.getElementById("vouchers_map"));
        
        geo = new GClientGeocoder(); 
		
		map.addControl(new GLargeMapControl());
		map.addControl(new GMapTypeControl());
		
        map.enableDoubleClickZoom();
	
		var center = new GLatLng(36.370868,-5.050678);
		map.setCenter(center, 10);

	  	//var bounds = new GLatLngBounds();
	
		var src_xml = "http://www.moneyoffvouchers.net/maps_markers.xml.php";	
        GDownloadUrl(src_xml, function(data) {
          	var xml = GXml.parse(data);
          	var markers = xml.documentElement.getElementsByTagName("marker");
            for (var i = 0; i < markers.length; i++) {
            	
				var id = markers[i].getAttribute("id");
            	var name = markers[i].getAttribute("name");
				var country_name = markers[i].getAttribute("country_name");
                var region_name = markers[i].getAttribute("region_name");
                var city_name = markers[i].getAttribute("city_name");
            	var category_name = markers[i].getAttribute("category_name");
				var parent_category_name = markers[i].getAttribute("parent_category_name");
				var image = markers[i].getAttribute("image");
				var url = markers[i].getAttribute("url");
                var point = new GLatLng(parseFloat(markers[i].getAttribute("lat")),
                                    parseFloat(markers[i].getAttribute("lng")));
            	//bounds.extend(point);
                createMarker_view(point, id, name, country_name, region_name, city_name, category_name, parent_category_name, image, url);            					
    		    //map.setZoom(map.getBoundsZoomLevel(bounds));
	        	//map.setCenter(bounds.getCenter());                

          	}     
         });     


			
	}



	function initialize_business_edit_map(plat, plng, zoom) {
        map = new GMap2(document.getElementById("map"));
        
        geo = new GClientGeocoder(); 

        		
		if( (plat=='' && plng=='') || (plat=='0' && plng=='0') ){
			plat = 51.6971;
			plng = -0.241699;
		}
        
        if( zoom=='' || zoom=='0' ){
			zoom = 5;
            document.getElementById('zoom').value = 5;
		}
		
        
		map.addControl(new GLargeMapControl());

		map.enableDoubleClickZoom();
		var center = new GLatLng(plat,plng);
		map.setCenter(center, zoom);
	  		
		marker = new GMarker(center, { draggable: true});
		map.addOverlay(marker);

			
		GEvent.addListener(marker, "dragstart", function() {
			map.closeInfoWindow();
		});

		GEvent.addListener(marker, "dragend", function() {
			document.getElementById('lat').value = marker.getPoint().lat();
			document.getElementById('lng').value = marker.getPoint().lng();
		});
				
   		GEvent.addListener(map, "click", function(overlay,point) {
	 		marker.setPoint(point);		    
			document.getElementById('lat').value = marker.getPoint().lat();
			document.getElementById('lng').value = marker.getPoint().lng();
        });		
        
        
        GEvent.addListener(map, "zoomend", function() {
			document.getElementById('zoom').value = map.getZoom();
			
		});

	}



	function initialize_business_map(plat, plng, zoom) {
		map = new GMap2(document.getElementById("map"));
        
        geo = new GClientGeocoder(); 

		if( (plat=='' && plng=='') || (plat=='0' && plng=='0') ){
			plat = 51.6971;
			plng = -0.241699;
		}
        
        if( zoom=='' || zoom=='0' ){
			zoom = 15;
		}
		
		map.addControl(new GLargeMapControl());

		map.enableDoubleClickZoom();
	
		var center = new GLatLng(plat,plng);
		map.setCenter(center, zoom);
	  		
		marker = new GMarker(center, { draggable: false});
		map.addOverlay(marker);
			
	}




	function initialize_contact_map() {
		map = new GMap2(document.getElementById("contact_map"));
        
        geo = new GClientGeocoder(); 
		
		map.addControl(new GLargeMapControl());

		map.enableDoubleClickZoom();
	
		var center = new GLatLng(47.5,-4);
		map.setCenter(center, 3);
	  		
        var p1 = new GLatLng(50.7230665,-1.9345685);    
		marker1 = new GMarker(p1, { draggable: false});
		map.addOverlay(marker1);

        var p2 = new GLatLng(36.342187,-5.238414);    
		marker2 = new GMarker(p2, { draggable: false});
		map.addOverlay(marker2);
			
	}




}else {
	alert("Sorry, the Google Maps API is not compatible with this browser");
}