var myrules = {
	'form#signup' : function(element){
		element.onsubmit = function() {
			document.getElementById('join_submit').disabled = true;
		}
	},
	'TABLE #dates TR' : function(element){
		element.onmouseover = function(){
			this.style.backgroundColor = '#999';
		},
		element.onmouseout = function(){
			if (this.className == 'on') {
				this.style.backgroundColor = '#CCC';
			} else {
				this.style.backgroundColor = '#FFF';
			}
		}
	}
};

Behaviour.register(myrules);