Hello! i'm Jamara and I'm with a problem: tryed implement your code, but I can't drag the columns for the last or first positions...Do you can help me??

Thank's!!
The code is this:


Code:
var drag = false; 
document.onmouseup = release; 
document.onmousemove = mouseCoords; 
  
function allowDragging(tableId) { 
	
var dragTable = document.getElementById(tableId); 
 // alert("dragTable
...