/******************************************************************************/
/* Fix for Column sorting broken for DataTables nested in HTML TABLE elements */
/* see http://yuilibrary.com/projects/yui2/ticket/2527707                     */
/******************************************************************************/

YAHOO.widget.DataTable.prototype.getTdEl = function(cell) {

var Dom = YAHOO.util.Dom,

lang = YAHOO.lang,
elCell,
el = Dom.get(cell);

// Validate HTML element
if(el && (el.ownerDocument == document)) {

// Validate TD element
if(el.nodeName.toLowerCase() != "td") {

// Traverse up the DOM to find the corresponding TR element
elCell = Dom.getAncestorByTagName(el, "td");

}
else {

elCell = el;

}

// Make sure the TD is in this TBODY
if(elCell && (elCell.parentNode.parentNode == this._elTbody)) {

// Now we can return the TD element
return elCell;

}

}
else if(cell) {

var oRecord, nColKeyIndex;

if(lang.isString(cell.columnKey) && lang.isString(cell.recordId)) {

oRecord = this.getRecord(cell.recordId);
var oColumn = this.getColumn(cell.columnKey);
if(oColumn) {

nColKeyIndex = oColumn.getKeyIndex();

}

}
if(cell.record && cell.column && cell.column.getKeyIndex) {

oRecord = cell.record;
nColKeyIndex = cell.column.getKeyIndex();

}
var elRow = this.getTrEl(oRecord);
if((nColKeyIndex !== null) && elRow && elRow.cells && elRow.cells.length > 0) {

return elRow.cells[nColKeyIndex] || null;

}

}

return null;

};