var ToolTip = Class.create();

ToolTip.prototype = {
	initialize: function( el ){
		Event.observe( el, 'mouseover', this.toggleTip.bindAsEventListener(el) );
		Event.observe( el, 'mouseout', this.toggleTip.bindAsEventListener(el) );
	},
	toggleTip: function( event ){
		var tip = this.select( '.Tip')[0];
		tip.toggle();
		Event.stop( event );
	}
}

Event.observe( window, 'load', function(){ $$( '.ToolTip' ).each( function( el ){ new ToolTip(el); } ); } );