function valto(id){
   stopSlide(); 
   for(var i=1;i<5;i++){
        var v = document.getElementById("valto_"+i);
        v.style.display = "none";
    }
    var v2 = document.getElementById("valto_"+id);
    v2.style.display = "block";  
}
var j = 0;
function runSlideShow(id){ 
    for(var i=1;i<5;i++){
        var v = document.getElementById("valto_"+i);
        v.style.display = "none";
    }
    var v2 = document.getElementById("valto_"+id);
        v2.style.display = "block";

    j=j+1;    
    t = setTimeout('runSlideShow("'+j+'")', 3000); 
    if(j==4)j=0; 
}

function stopSlide()
{
clearTimeout(t);
}