/*
	name			: ClassBehaviours, the javascript framework based on class-name parsing
	update			: 20081124
	author			: Maurice van Creij
	dependencies	: jquery.classbehaviours.js
	info			: http://www.classbehaviours.com/

    This file is part of jQuery.classBehaviours.
    
    ClassBehaviours is a javascript framework based on class-name parsing.
    Copyright (C) 2008  Maurice van Creij

    ClassBehaviours is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    ClassBehaviours is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with ClassBehaviours. If not, see http://www.gnu.org/licenses/gpl.html.
*/

	// create the jQuery object if it doesn't already exist
	if(typeof(jQuery)=='undefined') jQuery = function(){};
	
	// create the root classbehaviours object if it doesn't already exist
	if(typeof(jQuery.classBehaviours)=='undefined') jQuery.classBehaviours = function(){};
	
	// create the handlers child object if it doesn't already exist
	if(typeof(jQuery.classBehaviours.handlers)=='undefined') jQuery.classBehaviours.handlers = function(){}

	// replace in src sub-string
	jQuery.classBehaviours.handlers.srcMouseHover = {
		// properties
		name: 'srcMouseHover',
		cache: new Array(),
		// methods
		start: function(node){
			this.cacheImages(node);
			node.onmouseover = this.addHover;
			node.onmouseout = this.remHover;
		},
		cacheImages: function(that) {
			var objNode = (typeof(this.nodeName)=='undefined') ? that : this ;
			// if this is not the image, it must be the parent
			if(!objNode.src) objNode = objNode.getElementsByTagName('IMG')[0];
			// replace link by hover
			var cacheIdx = this.cache.length;
			// hover version
			this.cache[cacheIdx] = new Image();
			this.cache[cacheIdx].src = objNode.src.replace('_link','_hover');
			// active version
			this.cache[cacheIdx+1] = new Image();
			this.cache[cacheIdx+1].src = objNode.src.replace('_link','_active');
		},
		// events
		addActive: function(that){
			var objNode = (typeof(this.nodeName)=='undefined') ? that : this ;
			// if this is not the image, it must be the parent
			if(objNode.nodeName!='IMG') objNode = objNode.getElementsByTagName('IMG')[0];
			// replace link by active
			objNode.src = objNode.src.replace('_link','_active');
			// replace hover by active
			objNode.src = objNode.src.replace('_hover','_active');
		},
		addHover: function(that){
			var objNode = (typeof(this.nodeName)=='undefined') ? that : this ;
			// if this is not the image, it must be the parent
			if(!objNode.src) objNode = objNode.getElementsByTagName('IMG')[0];
			// replace link by hover
			objNode.src = objNode.src.replace('_link','_hover');
		},
		remHover: function(that){
			var objNode = (typeof(this.nodeName)=='undefined') ? that : this ;
			// if this is not the image, it must be the parent
			if(!objNode.src) objNode = objNode.getElementsByTagName('IMG')[0];
			// replace link by hover
			objNode.src = objNode.src.replace('_hover','_link');
		}
	}
			
	// add this addon to the jQuery object
	if(typeof(jQuery.fn)!='undefined'){
		// extend jQuery with this method
		jQuery.fn.srcMouseHover = function(){
			return this.each(
				function(){
					jQuery.classBehaviours.handlers.srcMouseHover.start(this);
				}
			);
		};
		// if the main parser isn't present
		if(typeof(jQuery.classBehaviours.parser)=='undefined'){
			// set the event handler for this jQuery method
			$(document).ready(
				function(){
					$(".srcMouseHover").srcMouseHover();
				}
			);
		}
	}