if/else conditions in CSS?

here is list of operators are available

lt = less than operator lte = less than or equal to gt = greater than gte = greater than or equal to ! = the NOT operator () = subexpression operator & = the AND operator | = the OR operator true = evaluates to true false = evaluates to false

you can use this like this

<!--[if lt IE 7 ]>
  <p>Only less than IE 7 will see this</p>
<![endif]-->


<!--[if gte IE 6 ]>
 <p>Only  IE 6 and greater will see this</p>
<![endif]-->