(function($) {
	$.msgAlert = function(config) {
		
		var defaults, options, msgAlert, popup, header, close, content, footer, overlay;

		defaults = {
			type: ''
			, title: ''
			, text: ''
			, callback: function () {}
			, closeTrigger: true
			, escClose: true
			, overlay: true
			, overlayClose: false
			, buttons: [{
				text: 'Ok'
				, callback: function () {
					$.msgAlert.close ();  
					options.callback (); 
				}
			}]
		};
		
		options = $.extend(defaults, config);
		
		msgAlert = $('<div>', { 
			'class' : 'msgAlert ' + options.type
		}).appendTo ('body');
		
		popup = $('<div>', { 
			'class' : 'msgAlert_popup' 
		}).appendTo (msgAlert);
		
		if (options.title != '') {
			header = $('<div/>', { 
				'class' : 'msgAlert_header', 'html': '<h4>' + options.title + '</h4>' 
			}).appendTo (popup);
		}
		
		if (options.closeTrigger) {
			close = $('<a>', { 
				'href': 'javascript:;'
				, 'class': 'msgAlert_close'
				, 'click': close
			}).appendTo (header);	
		}		
		
		content = $('<div/>', { 
			'class': 'msgAlert_content' 
			, 'text': options.text
		}).appendTo (popup);
		
		footer = $('<div/>', { 
			'class': 'msgAlert_footer' 
		}).appendTo (msgAlert);	
		
		if (options.overlay) {
			overlay = $('<div/>', {
				'class': 'msgAlert_overlay'
			}).appendTo ('body');
			
			if (options.overlay && options.overlayClose) {
				overlay.bind ('click', close);			
			}
		}
				
		
		if (options.type == 'warning') {
			options.buttons = [{ 
				text: 'Yes'
				, callback: function () { 
					options.callback (); 
					$.msgAlert.close (); 
				} 
			}, { 
				text: 'No'
				, callback: function () { $.msgAlert.close (); }	
			}, {
				text: 'Cancel'
				, callback: function () { $.msgAlert.close ();	}	
			}];		
		}
		
		if (options.buttons.length > 0) {
			for (key in options.buttons) {		
				$('<button>', { 'text': options.buttons[key].text })
					.bind ('click', options.buttons[key].callback)
					.appendTo (footer);
			}
		}
		
		msgAlert.appendTo ('body');
		
		msgAlert.find ('button:first').focus ();
		
		if (options.escClose) {
			$(document).bind ('keyup.msgAlert', function (e) { 
				if (e.keyCode == 27) { 
					$.msgAlert.close (); 
				} 
			});
		}
		
		function close (e)
		{
			e.preventDefault ();			
			$.msgAlert.close ();
		}
	};
	
	$.msgAlert.close = function () {
		$('.msgAlert').fadeOut ('fast', function () { $(this).remove (); });
		$('.msgAlert_overlay').fadeOut ('fast', function () { $(this).remove (); });
		$(document).unbind ('keyup.msgAlert');
	}
})(jQuery);