number border effect

i want to bring the following effect on one of my projects as in yah开发者_如何学编程oo search.i tried a lot but couldnot make it.please somebody help me.![alt text][1]

http://www.freeimagehosting.net/uploads/b253a30c3b.jpg

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Make your links block-level and use a border like this:

a{
  display:block
  border:1px solid #0000ff;
  width:50px;
  height:50px;
}

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Here is solution.

<style>

a {padding:3px; border:1px #000000 solid;}

</style>