function enhance(user){
  if(user == "anna"){
    var anna= document.getElementById('anna');
    anna.className = "anna_over";
    var daniel = document.getElementById('daniel');
    if(daniel.className != "daniel"){
      daniel.className = "daniel";
    }
    var georgie = document.getElementById('georgie');
    if(georgie.className != "georgie"){
      georgie.className = "georgie";
    }
  } else if(user == "daniel"){
    var daniel= document.getElementById('daniel');
    daniel.className = "daniel_over";
    var anna = document.getElementById('anna');
    if(anna.className != "anna"){
      anna.className = "anna";
    }
    var georgie = document.getElementById('georgie');
    if(georgie.className != "georgie"){
      georgie.className = "georgie";
    }
  } else	if(user == "georgie"){
    var georgie = document.getElementById('georgie');
    georgie.className = "georgie_over";
    var daniel = document.getElementById('daniel');
    if(daniel.className != "daniel"){
      daniel.className = "daniel";
    }
    var anna = document.getElementById('anna');
    if(anna.className != "anna"){
      anna.className = "anna";
    }
  }
}