/*--------------------alpha01------------------*/
#main_menu{
width:750px;
clear:both;}

#main_menu ul li{
float:left;
margin:0px 0px 0px 0px;}

#main_menu ul li a:hover{
background:#fff;
filter: alpha(opacity=20);
opacity:0.2;
}

#main_menu ul li a{
display:block;
height:51px;
text-indent:-9999px;
text-align:left;
outline:none;
}

#main_menu01{
background:url(img/common/main_menu01.jpg) no-repeat 0px 0px;
width:188px;
height:51px;
padding-bottom:5px;}
#main_menu02{
background:url(img/common/main_menu02.jpg) no-repeat 0px 0px;
height:51px;
padding-bottom:5px;
width:188px;}
#main_menu03{
background:url(img/common/main_menu03.jpg) no-repeat 0px 0px;
width:188px;
padding-bottom:5px;
height:51px;}
#main_menu04{
background:url(img/common/main_menu04.jpg) no-repeat 0px 0px;
width:186px;
padding-bottom:5px;
height:51px;}