#main_img{
position:absolute;
width:100%;
height:auto;
text-align:center;
z-index:-1;
}
#main_img img{
width:100%;
min-width:1030px;
max-width:1200px;
height:auto;
}

#wrapper{
position:relative;
padding:2% 0px 0px 2%;
}
#side{width:230px;}
#contents_main{width:100%; margin:0px 0px 0px -230px; padding:0px 0px 0px 230px;}

#main{
position:relative;
min-height:1000px;
}