var minl = 0;
var maxv = 6;
var vvid = 0;
var vlin = 0;

function turnrightstart(){
  
  
  if(vvid < (maxv-4)){
    vvid = vvid + 1;
    minl = minl - 125;
    document.getElementById('allvids').style.marginLeft = minl;
  }
}
function turnleftstart(){
  
  
  if(vvid > 0){
    vvid = vvid - 1;
    minl = minl + 125;
    document.getElementById('allvids').style.marginLeft = minl;
  }
}

function vlozinz(){
  if(vlin == 0){
    document.getElementById('vlozeniinz').style.display = "block";
    vlin = 1;
  }
  else{
    document.getElementById('vlozeniinz').style.display = "none";
    vlin = 0;
  }
}
function showdinz(ktery){
  document.getElementById(ktery).style.display = "block";

}