var box_sos, Ncovers, items_sos, rest;

function init_sos(){
box_sos = document.getElementById('slidersos');
Ncovers = box_sos.getElementsByTagName('img').length;
items_sos = Math.floor(Ncovers/6);
rest = Ncovers%6;

    setTimeout("slide1(0)", 5000);
}

    function slide1(a){

        if(a <= 775){
            a=a+3;
            box_sos.style.marginLeft = -a + "px";
            setTimeout("slide1(" + a + ")", 5);
        }
    }