code: function scrollToBottom(){
  
  
  var it= jQuery('#testit');
  var message= jQuery('#messages');
  
  var newMessage= message.children('li:last-child')
  var clientH= it.prop('clientHeight');
  var scrollTop=it.prop('scrollTop');
  var scrollH=it.prop('scrollHeight');
  var newMessageH= newMessage.innerHeight();
  var prevmessageH=newMessage.prev().innerHeight();
  var t=clientH+scrollTop+newMessageH+prevmessageH;
  if(clientH+scrollTop+newMessageH+prevmessageH>=scrollH){
  it.scrollTop(scrollH);
  }
  }
docs: scroll to bottom