/**
 *	ClassName module
 *	--------------------------
 * (c) Lost Boys - http://www.lostboys.nl
 */

var ClassName = {
	add:function(node, name) {
		if(!this.contains(node, name))
			node.className += node.className? (' ' + name) : name;
	},

	remove:function(node, name) {
		if(node.className)
			node.className = node.className.replace(new RegExp('(^|\\s)'+name+'(\\s|$)','g'), ' ');
	},

	contains:function(node, name) {
		return new RegExp('(^|\\s)'+name+'(\\s|$)').test(node.className);
	},

	swap:function(node, old, name) {
		node.className = this.contains(node, old)?
			node.className.replace(new RegExp('(^|\\s)'+old+'(\\s|$)','g'), '$1'+name+'$2') : 
			node.className.replace(new RegExp('(^|\\s)'+name+'(\\s|$)','g'), '$1'+old+'$2');
	},

	toggle:function(node, name) {
		if(!this.contains(node, name)) {
			this.add(node, name);
		} else {
			this.remove(node, name);
		}
	}
}