fuel/fuel/core/classes/database/query/builder/join.php
public function or_on($c1, $op, $c2)
	{
		$this->_on[] = array($c1, $op, $c2, 'OR');

		return $this;
	}
public function or_on($c1, $op, $c2)
	{
		$this->_on[] = array($c1, $op, $c2, 'OR');

		return $this;
	}
public function or_on ( $ c1 , $ op , $ c2 ) { $ this -> _on [ ] = array ( $ c1 , $ op , $ c2 , 'OR' ) ; return $ this ; }
Adds a new OR condition for joining.

@param   mixed   $c1  column name or array($column, $alias) or object
@param   string  $op  logic operator
@param   mixed   $c2  column name or array($column, $alias) or object

@return  $this
Adds a new OR condition for joining .