#main_container .main .bg_1 {
        background:url(../images/main/bg_3.jpg) 0 0 no-repeat;
    }
    
    #main_container .main .bg_2 {
        background:url(../images/main/bg_1.jpg) 0 0 no-repeat;
    }
    
    #main_container .main .bg_3 {
        background:url(../images/main/bg_2.jpg) 0 0 no-repeat;
    }
    
    #main_container .main .bg_4 {
        background:url(../images/main/bg_4.jpg) 0 0 no-repeat;
    }