Global.helma.File.makeDirectory ()
Sourcecode in /home/hannes/helma/modules/helma/File.js:
283:   this.makeDirectory = function() {
284:         if (self.isOpened())
285:            return false;
286:         // don't do anything if file exists or use multi directory version
287:         return (file.exists() || file.mkdirs());   
288:      }