a:link {
	color:#669900;
	text-decoration: none;
}
a:visited {
	text-decoration: none;
	color: #996633;
}

a:active {
	text-decoration: none;
}
h1 {
	font-size: 18px;
	background-color:#66CC00;
	color: #fff;
}
h2 {
	font-size: medium;
	background-color:#66CC00;
	color: #fff;
}
h3 {
	font-size: medium;
	background-color:#66CC00;
	color: #fff;
}
.style1 {font-size: 14px}
.style2{background-color:#66cc00;
color:#ffffff}
<!-- ここからメイン-->
body {
	background-image: url(picture/back.gif);
	background-attachment:fixed
}

#navibar{
    width: 690px;
	height: 25px;
	margin: 0px;
	text-align: center;
    list-style: none;
}

.menu{
    float: left;
	background: #eeeeee;
	border: 1px solid #ccc;
	width: 80px;
	text-align:center;
	margin: 3px 0px 3px 3px;
}

.menu a{
	background: #eeeeee;
	display:block;
}

.menu a:hover{
    background: #66CC00;
	color: #fff;
}

<!-- google-->
#google{
z-index: 3;
position:absolute;
top: 20px;
left: 500px;
}