How to prevent link opening while div is dragged?

I have a draggable div that will also act as link. Currently after releasing the mouse after dragging div it opens the link. I am looking to have the link only open when clicked but not from being dragged and released

Does anyone have any suggestions?

<div id="draggable"><div id="draggableimg"><a href="events.html"><img src="Events.png"/></a></div></div>

#draggable {
  position: absolute;
  top: 100px;
  left: 100px;
}

#draggableimg img {
  width: 300px;
}


//Make the DIV element draggable:
dragElement(document.getElementById("draggable"));

function dragElement(elmnt) {
  var pos1 = 0, pos2 = 0, pos3 = 0, pos4 = 0;
if (document.getElementById(elmnt.id + "img")) {
/* if present, the header is where you move the DIV from:*/
document.getElementById(elmnt.id + "img").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";
}

function closeDragElement() {
/* stop moving when mouse button is released:*/
  document.onmouseup = null;
  document.onmousemove = null;
  }
}

from How to prevent link opening while div is dragged?