window.addEvent('domready', function(){
    
    var start_height = 46;
    var end_height = 295;
    $('button_bottom_sozial').set().addEvents({
        mouseenter: function(){            
               $('button_bottom_sozial').tween('height', end_height);
        },
        mouseleave: function(){            
               $('button_bottom_sozial').tween('height', start_height);     
        }
    });
    
    $('button_bottom_schulen').set().addEvents({
        mouseenter: function(){            
               $('button_bottom_schulen').tween('height', end_height);
         
            
        },
        mouseleave: function(){            
               $('button_bottom_schulen').tween('height', start_height);     
        }
    });
    
    $('button_bottom_firmen').set().addEvents({
        mouseenter: function(){            
               $('button_bottom_firmen').tween('height', end_height);
         
            
        },
        mouseleave: function(){            
               $('button_bottom_firmen').tween('height', start_height);     
        }
    });
    
    $('button_bottom_senioren').set().addEvents({
        mouseenter: function(){            
               $('button_bottom_senioren').tween('height', end_height);
         
            
        },
        mouseleave: function(){            
               $('button_bottom_senioren').tween('height', start_height);     
        }
    });     
    
    
});