You can use the validationOrder property to specify the order in which the field's validator function runs in relation to the validator function for any other field. The property is important if the validation of one field depends on the previous validation of another.
The value is a literal integer.
Validation occurs first for any fields for which you specified a value for the validationOrder property, and the items with the lowest-numbered values are validated first. Validation then occurs for any items for which you did not specify a value for validationOrder, and the order of validation in this case is the order in which the fields are defined in the JSF handler, VGUI record, or form.