Element.prototype.ondoubleclick = function(instructions){
  this.instructions = instructions;
  /*
    This script adds the ability for you to listen for a double click & execute a defined callback function when the event fires
    
    Usage after implementation:
    myElement.ondoubleclick(function);
    
  */
  window.timeClickedElement = false;
  this.onmousedown = function(){
    if(window.timeClickedElement){
      var now = Date.now();
      var ttl = now - window.timeClickedElement;
      if(ttl <= 250){
        // doubleclicked
        this.instructions();
      }
      window.timeClickedElement = now;
    } else {
      window.timeClickedElement = Date.now();
    }
    return this;
  };
  
};