.main_navigation #nav_home {
	background:url(../images/navigation_btn.gif) no-repeat 0px -29px;
	padding-top:8px;
}
.main_navigation #nav_home:hover {
	padding-top:9px;
	background:url(../images/navigation_btn.gif) no-repeat;
	height:20px
}
.main_navigation #nav_jq {
	padding-top:9px;
	background:url(../images/navigation_btn.gif) no-repeat;
	height:20px
}