var myrules = {
			'img.swappee' : function(element){
				element.abHide = function(){
					this.style.display = 'none';
				}
				element.abShow = function(){
					if (element.style.display == 'none' || element.style.display == ''){
						this.style.display = 'block';
					}
				}
			},
			'a.swapper' : function(element){
				element.onclick = function(){
					for(thing in swaps){
						if (swaps[thing] == swaps[element.id]){	//we're iterating on this button
							getNode(swaps[thing]).abShow();	
						}else{
							getNode(swaps[thing]).abHide();	
						}
					}
					return false;
				}
			}
		};
			
		Behaviour.register(myrules);