#menu {
width:90%;
height:auto;  
padding :0px;
margin-left: 6%;
}

#menu ul { 
margin: 0px; 
padding :0px; 
list-style-type : none; 
}
#menu li { 
display : inline; 
padding :0px; 
margin:0px;
float:left; 
}
#menu #menu_a_1 a{
background-image: url(image/navi1.jpg);
width:270px; 
height:30px;
background-repeat:no-repeat; 
margin:0px 20px 10px 0px; 
padding:0px;
background-color:#fff;
display:block;
}
#menu #menu_a_1 a:hover {
background-image: url(image/navi1_2.jpg);
width:270px; 
height:30px;
background-repeat:no-repeat; 
margin:0px 20px 10px 0px; 
padding:0px;
background-color:#fff;
display:block;
}
#menu #menu_a_2 a{
background-image: url(image/navi2.jpg);
width:270px; 
height:30px;
background-repeat:no-repeat; 
margin:0px 20px 10px 0px; 
padding:0px;
background-color:#fff;
display:block;
}
#menu #menu_a_2 a:hover {
background-image: url(image/navi2_2.jpg);
width:270px; 
height:30px;
background-repeat:no-repeat; 
margin:0px 20px 10px 0px; 
padding:0px;
background-color:#fff;
display:block;
}
#menu #menu_a_3 a{
background-image: url(image/navi3.jpg);
width:270px; 
height:30px;
background-repeat:no-repeat; 
margin:0px 0px 10px 0px; 
padding:0px;
background-color:#fff;
display:block;
}
#menu #menu_a_3 a:hover {
background-image: url(image/navi3_2.jpg);
width:270px; 
height:30px;
background-repeat:no-repeat; 
margin:0px 0px 10px 0px; 
padding:0px;
background-color:#fff;
display:block;
}



.span1 {display:none;}