Validation.addAllThese([

    ['validate-phoneCustom', 'Please enter a valid phone number. It should be between 9 and 12 digits, digits only. For example: 1234567890.', function(v) {
    	return Validation.get('IsEmpty').test(v) || /^[0-9]+$/.test(v);
    }],
    ['validate-phoneDigits', 'Please enter a valid phone number. It should be between 9 and 12 digits, digits only. For example: 1234567890.', function(v) {
    	 var pass=v.strip();
         return (pass.length>=9 && pass.length < 13);
    }]

]);