document.addEvent('domready', function() {
    el_tri = $('events-list').getElement('a.tria img');
    el_masc = $('events-list').getElement('a.masc img');
    el_dayt = $('events-list').getElement('a.dayt img');
    el_hall = $('events-list').getElement('a.hall img');

    el_tri.addEvents({
        'mouseenter': function() {
            el_masc.set('tween', {duration: '400'});
            el_masc.tween('opacity', '0');
            el_dayt.set('tween', {duration: '400'});
            el_dayt.tween('opacity', '0');
            el_hall.set('tween', {duration: '400'});
            el_hall.tween('opacity', '0');
        },
        'mouseleave': function() {
            el_masc.set('tween', {duration: '400'});
            el_masc.tween('opacity', '1');
            el_dayt.set('tween', {duration: '400'});
            el_dayt.tween('opacity', '1');
            el_hall.set('tween', {duration: '400'});
            el_hall.tween('opacity', '1');
        }                 
        });    
    el_masc.addEvents({
        'mouseenter': function() {
            el_tri.set('tween', {duration: '400'});
            el_tri.tween('opacity', '0');
            el_dayt.set('tween', {duration: '400'});
            el_dayt.tween('opacity', '0');
            el_hall.set('tween', {duration: '400'});
            el_hall.tween('opacity', '0');
        },
        'mouseleave': function() {
            el_tri.set('tween', {duration: '400'});
            el_tri.tween('opacity', '1');
            el_dayt.set('tween', {duration: '400'});
            el_dayt.tween('opacity', '1');
            el_hall.set('tween', {duration: '400'});
            el_hall.tween('opacity', '1');
        }                 
        });   
    el_dayt.addEvents({
        'mouseenter': function() {
            el_tri.set('tween', {duration: '400'});
            el_tri.tween('opacity', '0');
            el_masc.set('tween', {duration: '400'});
            el_masc.tween('opacity', '0');
            el_hall.set('tween', {duration: '400'});
            el_hall.tween('opacity', '0');
        },
        'mouseleave': function() {
            el_tri.set('tween', {duration: '400'});
            el_tri.tween('opacity', '1');
            el_masc.set('tween', {duration: '400'});
            el_masc.tween('opacity', '1');
            el_hall.set('tween', {duration: '400'});
            el_hall.tween('opacity', '1');
        }                 
        });   
    el_hall.addEvents({
        'mouseenter': function() {
            el_tri.set('tween', {duration: '400'});
            el_tri.tween('opacity', '0');
            el_masc.set('tween', {duration: '400'});
            el_masc.tween('opacity', '0');
            el_dayt.set('tween', {duration: '400'});
            el_dayt.tween('opacity', '0');
        },
        'mouseleave': function() {
            el_tri.set('tween', {duration: '400'});
            el_tri.tween('opacity', '1');
            el_masc.set('tween', {duration: '400'});
            el_masc.tween('opacity', '1');
            el_dayt.set('tween', {duration: '400'});
            el_dayt.tween('opacity', '1');
        }                 
        }); 
});