//var point_center = new GLatLng(0,0);
var polygon = new GPolygon();

function initialize(){
var map = new GMap2(document.getElementById("map_canvas"));

if (point_center.x==0 && point_center.y==0)
{
	map.setCenter(new GLatLng(39.917, 116.397), 12);
}else{
	var latOffset = 0.01;  
	var lonOffset = 0.01; 
	map.setCenter(point_center,12);
	point = point_center;
	polygon = new GPolygon([    
		new GLatLng(point.y, point.x - lonOffset),        
		new GLatLng(point.y + lonOffset, point.x),        
		new GLatLng(point.y, point.x + lonOffset),        
		new GLatLng(point.y - lonOffset, point.x),        
		new GLatLng(point.y, point.x - lonOffset)  ], "#005296", 5, 1, "#006549", 0.2);
	map.addOverlay(polygon);
}
map.addControl(new GSmallMapControl());

GEvent.addListener(map, 'click', function(overlay,point) {  
	var latOffset = 0.01;  
	var lonOffset = 0.01;  
	map.removeOverlay(polygon);

	point_center = point;
	polygon = new GPolygon([    
		new GLatLng(point.y, point.x - lonOffset),        
		new GLatLng(point.y + lonOffset, point.x),        
		new GLatLng(point.y, point.x + lonOffset),        
		new GLatLng(point.y - lonOffset, point.x),        
		new GLatLng(point.y, point.x - lonOffset)  ], "#005296", 5, 1, "#006549", 0.2);
	map.addOverlay(polygon);});
}

$(function (){   
      $('#submit_mappos').click(function (){

		$.post('/add_location.php',{id:$('#comment_rel_id').val(),x:point_center.x,y:point_center.y}, function (data){alert(data);});  
	  });    
        
});