i am using a lightbox clone (slimbox ex)  in a module and there seems to be a conflict with dnn xtropy skin.  I am trying to find the conflict but not having much success.  The error message that appears points to some dnn javascript

Error: 'style.display' is null or not an object

Points to the bHidden variable assignment below.

//dims object
dnn_dom_positioning.prototype.dims = function (eSrc)
{
 var bHidden = (eSrc.style.display == 'none');
 
 if (bHidden)
  eSrc.style.display = "";
 
 this.w = dnn.dom.positioning.elementWidth(eSrc);
 this.h = dnn.dom.positioning.elementHeight(eSrc);
 var oPos = dnn.dom.positioning.elementPos(eSrc);
 this.t = oPos.t;
 this.l = oPos.l;
 this.at = oPos.at; //actual top
 this.al = oPos.al; //actual left
 this.rot = this.at - this.t; //relative offset top
 this.rol = this.al - this.l; //relative offset left
 
 this.r = this.l + this.w;
 this.b = this.t + this.h;
 
 if (bHidden)
  eSrc.style.display = "none";
 
}