I'm using Denis' outstanding tableDnD jquery plugin.
I would like to allow users to drag/drop rows but only when their mouse is within a particular td within the row.

So far I've tried two methods:(note that the var "tr" contains the jquery row element I'm operating on. the td id="queue\_position" is the one I'm trying to enable dragging for).

I think that tableDnD only checks for the nodrag class when it starts up. adding or deleting the nodrop class dynamically doesn't change anything. So I tried two ways to do what I need to do.

Attempt one was to dive into tableDnD internals and try to call it's makeDraggable function.
Attempt two was to re-initialize tableDnD after adding/removing the nodrop class.

Either of these methods seems to work to **enable** dragging when in the allowed td.
Neither of them properly **disables** dragging when leaving the td. Once a row is enabled in the mouseenter event it stays enabled forever. 

I'd prefer to find a way to do what I need without modifying tableDnD.

Any suggestions on how to make this work?

```
$(tr)
  .addClass("nodrag")
  .find("td[id='queue_position']")
//.on("mouseenter",function() { 
//    $(tr).removeClass("nodrag"); 
//    $.tableDnD.makeDraggable(document.getElementById("tableLeft"));
//})
//.on("mouseleave",function() { 
//    $(tr).addClass("nodrag");    
//    $.tableDnD.makeDraggable(document.getElementById("tableLeft"));
//});

 .on("mouseenter",function() { 
      $(tr).removeClass("nodrag"); 
      $("#tableLeft").tableDnD({onDrop: handleDragDrop});
 })
 .on("mouseleave",function() { 
      $(tr).addClass("nodrag");
      $("#tableLeft").tableDnD({onDrop: handleDragDrop});
 });      

```