f = function(d) { 
        //alert(d.join(\"\\n\")); 

        for ( var i = d.length - 1 ; i > 0 ; i-- ) 
        { 
                for ( var j = 0 ; j < d[i].length ; j   ) 
                { 
                        if ( !d[i][j] && d[i-1][j] ) 
                        { 
                                var go = true; 
                                if ( j > 0 && d[i-1][j-1] ) 
                                        go = false; 
                                if ( j < d[i].length - 1 && d[i-1][j 1] ) 
                                        go = false; 
                                if ( ( j > 0 ) && ( j < d[i].length - 1 ) && d[i][j-1] && d[i][j 
 1] ) 
                                        go = false; 
                                if ( go ) 
                                { 
                                        d[i][j] = true; 
                                        d[i-1][j] = false; 
                                } 
                        } 
                } 
        } 

        //alert(d.join(\"\\n\")); 

}