Fajax -- the fake alternative to ajax
If you don't have the time to build a real Ajax thing, these 2 lines in your HEAD section page can remove easily the flicker effect on your page (only for Internet Explorer anyway). This is really great for admin tools or Intranet (in my case all my users works with IE).
<META http-equiv="Page-Enter" content="blendTrans(Duration=0.2)">
<META http-equiv="Page-Exit" content="blendTrans(Duration=0.2)">
Thanks to secretGeek!