function getExcelColName(length) {
		var strName = '';

		if ( length <= 26 ) {
			strName = LETTERS[length];
		}
		else {
			strName += LETTERS[ Math.floor(length/LETTERS.length)-1 ];
			strName += LETTERS[ (length % LETTERS.length) ];
		}

		return strName;
	}
DESC: Calc and return excel column name (eg: 'A2')