function Alerts(server, path, path_types, file, extension) {
	var _server = server;
	var _path = path;
	var _path_types = path_types;
	var _file = file;
	var _extension = extension;
	this.show = function(obj) {
		document.getElementById(obj).style.display = 'block';
		document.getElementById('mapimage').style.cursor = 'pointer';
	}
	this.hide = function(obj) {
		document.getElementById(obj).style.display = 'none';
		document.getElementById('mapimage').style.cursor = 'default';
	}
	this.change = function(nr) {
		var im = new Image();
		if(nr == '')
			im.src = _server+_path+_file+"."+_extension;
		else		
			im.src = _server+_path_types+_file+nr+"."+_extension;
		document.getElementById('mapimage').src = im.src;
	}
}