why there is a space between the two div under IE7?

http://xanlz.com/template/

why there is a space between <div class="nav-top">...</div> and <div class="nav-inner clear"> </div> (the test navigation part and its below part) under IE, But ok under firefox and chrome开发者_如何学运维.

how to correct it. thank you.

---

on IE6\IE7 div can't adaptive, so set 'height' for your parent DIV, such as

.nav-top { margin-left: 19px; height: 20px;}