formvalidation.io - Requiring at least one field

I am using http://formvalidation.io/ for my form validations.

I want to use this script http://formvalidation.io/examples/requiring-at-least-one-field/

However I want the input to be a "number" field instead of a "text" field. When I change to a number field it doesn't work correctly. Any idea why and what do I need to change?
petewinterAsked:
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Leonidas DosasCommented:
Using the type number in the input element at HTML 5 you may encounter some problems dependent from the browser. See the the following link for this issue type input (Can I use...support)
Instead of this you can set
HTML:
<input type='text' onkeypress='validate(event)' />

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JS:
function validate(evt) {
  var theEvent = evt || window.event;
  var key = theEvent.keyCode || theEvent.which;
  key = String.fromCharCode( key );
  var regex = /[0-9]|\./;
  if( !regex.test(key) ) {
    theEvent.returnValue = false;
    if(theEvent.preventDefault){
      theEvent.preventDefault();
    }
  }
}

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petewinterAuthor Commented:
Thanks for that, but I would like the number increment/decrement if possible. Is it not possible to get the script work using a number type instead?
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petewinterAuthor Commented:
Found a work around, but thanks for your help.
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