this.factory = config.factory || Roo.BorderLayout.RegionFactory;
for(var i = 0, len = this.factory.validRegions.length; i < len; i++) {
var target = this.factory.validRegions[i];
this.factory = config.factory || Roo.BorderLayout.RegionFactory;
for(var i = 0, len = this.factory.validRegions.length; i < len; i++) {
var target = this.factory.validRegions[i];