Can javascript create a folder within the path folder?

Can javascript create a folder within the path folder where all the files are contained?  How would I go about doing this?

So, if path folder is on C:\Users\susan\Desktop\pathfolder\.  How can I make it create a folder within pathfolder called "labeled" to where the processed files would save to?

I can't use b/c this does not take into account the current pathfolde within which I want to create the "labeled" folderr:

this.saveAs("/c/temp/temp.pdf");

this.saveAs("/c/MyDocs/" + this.documentFileName);