var myrules = {
		'img.copyright-guahniets' : function(element){
			element.onmouseover = function(){
				this.src = '/gfx/guahniets-on.png';
			},
			element.onmouseout = function(){
				this.src = '/gfx/guahniets.png';
			}
		},
		'img.copyright-easy-cms' : function(element){
			element.onmouseover = function(){
				this.src = '/gfx/powered-by-easy-cms-on.png';
			},
			element.onmouseout = function(){
				this.src = '/gfx/powered-by-easy-cms.png';
			}
		},
		'img.copyright-metromedia' : function(element){
			element.onmouseover = function(){
				this.src = '/gfx/metromedia-on.png';
			},
			element.onmouseout = function(){
				this.src = '/gfx/metromedia.png';
			}
		}
    };
    Behaviour.register(myrules);