#main_content {
height:80%;
margin-left:0px; 
overflow:auto;
position:absolute;
 
width:64%;
}

 #main_content2 {
height:80%;
margin-left:0px; 
overflow:auto;
position:absolute;
 
width:64%;
}

#main_content1 {
height:80%;
margin-left:0px; 
overflow:auto;
position:absolute;
 
width:64%;
}

.ssb_down {
background:transparent url(../images/icon-arrow-down1.png);
bottom:0;
cursor:pointer;
position:absolute;
right:0;
}

.ssb_sb {
background:transparent url(../images/middle2.png);
cursor:pointer;
position:absolute;
right:0;
}

.ssb_sb_down {
background:transparent url(../images/midhover2.png);
}

.ssb_sb_over {
background:transparent url(../images/midhover2.png);
}

.ssb_st {
background:transparent url(../images/back2.png)  ;

cursor:pointer;
height:100%;
position:absolute;
right:0;
top:0;
}

.ssb_up {
background:transparent url(../images/icon-arrow-up1.png);
cursor:pointer;
position:absolute;
right:0;
top:0;
}