document.addEvent('domready', function() {
    el_fb = $('social').getElement('a.fb img');
    el_in = $('social').getElement('a.in img');
    el_tw = $('social').getElement('a.tw img');
    el_yt = $('social').getElement('a.yt img');

    el_fb.addEvents({
        'mouseenter': function() {
            el_in.set('tween', {duration: '400'});
            el_in.tween('opacity', '0');
            el_tw.set('tween', {duration: '400'});
            el_tw.tween('opacity', '0');
            el_yt.set('tween', {duration: '400'});
            el_yt.tween('opacity', '0');
        },
        'mouseleave': function() {
            el_in.set('tween', {duration: '400'});
            el_in.tween('opacity', '1');
            el_tw.set('tween', {duration: '400'});
            el_tw.tween('opacity', '1');
            el_yt.set('tween', {duration: '400'});
            el_yt.tween('opacity', '1');
        }                 
        });    
    el_in.addEvents({
        'mouseenter': function() {
            el_fb.set('tween', {duration: '400'});
            el_fb.tween('opacity', '0');
            el_tw.set('tween', {duration: '400'});
            el_tw.tween('opacity', '0');
            el_yt.set('tween', {duration: '400'});
            el_yt.tween('opacity', '0');
        },
        'mouseleave': function() {
            el_fb.set('tween', {duration: '400'});
            el_fb.tween('opacity', '1');
            el_tw.set('tween', {duration: '400'});
            el_tw.tween('opacity', '1');
            el_yt.set('tween', {duration: '400'});
            el_yt.tween('opacity', '1');
        }                 
        });   
    el_tw.addEvents({
        'mouseenter': function() {
            el_fb.set('tween', {duration: '400'});
            el_fb.tween('opacity', '0');
            el_in.set('tween', {duration: '400'});
            el_in.tween('opacity', '0');
            el_yt.set('tween', {duration: '400'});
            el_yt.tween('opacity', '0');
        },
        'mouseleave': function() {
            el_fb.set('tween', {duration: '400'});
            el_fb.tween('opacity', '1');
            el_in.set('tween', {duration: '400'});
            el_in.tween('opacity', '1');
            el_yt.set('tween', {duration: '400'});
            el_yt.tween('opacity', '1');
        }                 
        });   
    el_yt.addEvents({
        'mouseenter': function() {
            el_fb.set('tween', {duration: '400'});
            el_fb.tween('opacity', '0');
            el_in.set('tween', {duration: '400'});
            el_in.tween('opacity', '0');
            el_tw.set('tween', {duration: '400'});
            el_tw.tween('opacity', '0');
        },
        'mouseleave': function() {
            el_fb.set('tween', {duration: '400'});
            el_fb.tween('opacity', '1');
            el_in.set('tween', {duration: '400'});
            el_in.tween('opacity', '1');
            el_tw.set('tween', {duration: '400'});
            el_tw.tween('opacity', '1');
        }                 
        });   
});