code: function(t,i,isOver){
  		var inc = drag.x-drag.l, c = t.c[i], c2 = t.c[i+1]; 			
  		var w = c.w + inc;	var w2= c2.w- inc;	//their new width is obtained					
  		c.width( w + PX);	c2.width(w2 + PX);	//and set	
  		t.cg.eq(i).width( w + PX); t.cg.eq(i+1).width( w2 + PX);
  		if(isOver){c.w=w; c2.w=w2;}
  	}
docs: This function updates column's width according to the horizontal position increment of the grip being
  dragged. The function can be called while dragging if liveDragging is enabled and also from the onGripDragOver
  event handler to synchronize grip's position with their related columns.
  @param {jQuery ref} t - table object
  @param {nunmber} i - index of the grip being dragged
  @param {bool} isOver - to identify when the function is being called from the onGripDragOver event