[miltorg]

for (let i=1; i < 5; i++) {
 window['v'+i].ondrop = drop_handler;
  window['v'+i].ondragover = dragover_handler;
} 


for (let i=1; i < 4; i++) {
 window['k'+i].ondragstart = dragstart_handler;
  window['k'+i].ondragend = dragend_handler;
}