function Zoomout()
{
	this._map_node=document.getElementById(_MAP_ID);
}
Zoomout.prototype=new Event;

Zoomout.prototype.mouse_up=function(event)
{
        stop_propagating_event(event);
        var params="type=map&action=zoomout&x="+this._x_click+"&y="+this._y_click;
        reload_map(params);
};