Probably, you have already heard about the property hasLayout in IE and maybe you even know what it is and how it affects display of elements. No? Then let's have a closer look at this mysterious property.
Conditional comments are used to write special instructions that only work in Internet Explorer below version 5.
Here are the examples how to place the elements in the middle of the parent element. One of them is improved to make it workable even in IE7 and IE6.