code: function findTdAtColIdx($tr, colIdx) {
  		var colspan,
  			res = null,
  			idx = 0;
  
  		$tr.children().each(function() {
  			if (idx >= colIdx) {
  				res = $(this);
  				return false;
  			}
  			colspan = $(this).prop("colspan");
  			idx += colspan ? colspan : 1;
  		});
  		return res;
  	}
docs: /* Find TD at given column index (considering colspans).