window.addEvent('domready', function() {
 
  $$('.clients').each(function(el) {


    var reset = false;
    var fx = new Fx.Tween(el,{
      duration: 350,
      transition: 'expo:in:out',
      link: 'cancel',
      onComplete:function() {
        if(reset) {
          el.setStyle('background-position','0 0');
        }
      }
    });


    el.setStyle('background-position','0 0').addEvents({
      'mouseenter': function(e) {
        e.stop();
        fx.start('background-position','-120px 0');
        reset = false;
      },
      'mouseleave': function(e) {
        reset = true;
        fx.start('background-position','-240px 0');
      }
    });
  });
  
  $$('.fb').each(function(el) {


    var reset = false;
    var fx = new Fx.Tween(el,{
      duration: 350,
      transition: 'expo:in:out',
      link: 'cancel',
      onComplete:function() {
        if(reset) {
          el.setStyle('background-position','0 0');
        }
      }
    });


    el.setStyle('background-position','0 0').addEvents({
      'mouseenter': function(e) {
        e.stop();
        fx.start('background-position','-25px 0');
        reset = false;
      },
      'mouseleave': function(e) {
        reset = true;
        fx.start('background-position','-50px 0');
      }
    });
  });
  










});