gaptcha/vanillajs/drag.js

var insideBox = false;

dragElement(document.getElementById("1"));
dragElement(document.getElementById("2"));
dragElement(document.getElementById("3"));
dragElement(document.getElementById("4"));

function dragElement(elmnt) {
  // if insideBox return;                               Besta
  var pos1, pos2, pos3, pos4;
  elmnt.style.top = (elmnt.offsetTop - pos2) + "px";
  elmnt.style.left = (elmnt.offsetLeft - pos1) + "px";
  if (document.getElementById(elmnt.id + "header")) {
    // if present, the header is where you move the DIV from:
    document.getElementById(elmnt.id + "header").onmousedown = dragMouseDown;
  } else {
    // otherwise, move the DIV from anywhere inside the DIV:
    elmnt.onmousedown = dragMouseDown;
  }

  function dragMouseDown(e) {
    e = e || window.event;
    e.preventDefault();
    // get the mouse cursor position at startup:
    pos3 = e.clientX;
    pos4 = e.clientY;
    document.onmouseup = closeDragElement;
    // call a function whenever the cursor moves:
    document.onmousemove = elementDrag;
  }

  function elementDrag(e) {
    e = e || window.event;
    e.preventDefault();
    // calculate the new cursor position:
    pos1 = pos3 - e.clientX;
    pos2 = pos4 - e.clientY;
    pos3 = e.clientX;
    pos4 = e.clientY;
    // set the element's new position:
    elmnt.style.top = (elmnt.offsetTop - pos2) + "px";
    elmnt.style.left = (elmnt.offsetLeft - pos1) + "px";
    
    /* if pos1 and pos2 lie within range of limits of box, insideBox = true, freeze ids 1,2,3,4                   Besta man */
  }

  function closeDragElement() {
    // stop moving when mouse button is released:
    // write logic if object is in box, change captcha parameters
    document.onmouseup = null;
    document.onmousemove = null;
  }
}

// if insideBox {
//      document.getElementById("1").disabled = true;
//      document.getElementById("2").disabled = true;
//      document.getElementById("3").disabled = true;
//      document.getElementById("4").disabled = true;
// }