Is there a number field with + and - feature? I am working with Form API to create a customized form shown in a block. Most of the fields are textfields. 

I need a +/- feature for a numeric textfield, i.e.:



Is there an existing field like the above I can use?
Try the Stepper Field module


  The Stepper Field module is based in a plugin for jQuery UI called jQuery.ui.Spinner and provides a new steps widget that can be added to any Integer field.


Here is the image