function dlCategories_OnMouseOver()
{
  //clear all effects for all TD's
		var  thisSPAN = event.srcElement;
		var  thisTD = thisSPAN.parentElement;
		
		var  colTRs = thisTD.parentElement.parentElement.rows;
		for (var i = 0; i <= colTRs.length - 1; i++)
		{
		  colTRs(i).cells(0).style.backgroundColor = "white";
				colTRs(i).cells(0).style.fontWeight = "normal";
		};

  // change styles for this TD
  thisTD.style.backgroundColor = "yellow";
		thisTD.style.fontWeight = "bold";
		if (thisTD.childNodes[0].style.backgroundColor != "bisque")
		{		
  		thisTD.childNodes[0].style.backgroundColor = "yellow";
		  thisTD.childNodes[0].style.fontWeight = "bold";
		};
};