Fundementally, Vaidation works like this:

• A form is constructed in HTML with no special validation code
• After the form is complete, construct and configure the form validator for 'theForm'.
• The FormValidator constructor, which takes up to three arguments:
• formName: the name of the form
• onLoadUser: Optional: the name of a function to invoke when the form is loaded
• onSubmitUser: Optional: the name of a function to invoke when the form is submited
• The set method takes n pair of name/values, and passes these values to each field validator upon construction.
• The attach method takes up to four args:
• fldName: the name of the field as referenced in the form
• type: Optional: the type of validator. The default is 'Simple'
• prompt: Optional: the name of the field as it will be shown to the user. The default is a transformation of the fldName
• description: Optional: additional description
• The attach method returns a Validator of the type requested. All Validators should either inherit the SimpleValidator, or just look like one.
• The set method, just like for forms, takes n pairs of name/values
• The setDescription method, used to set the description
• The setPrompt method, used to set the prompt and description
• The SimpleValidator, or Simple supports the following types of validation for strings:
• required -- true/false
• minLen -- set to the minimum length
• maxLen -- set to the maximum length
• The Date validator: for dates with optional min/max date validation
• The Email validator for email
• The Integer validator for integers with optional min/max validation
• The Float Validator for floats with optional min/max & precision validation and formating
• Just like forms, field validators support some pseudo events:
• onLoadUser: invoked when the form is loaded
• onSubmitUser: invoked when the form is submited. Good for final formatting prior to being sent to the server
• onChangeUser: invoked when the value changes, on a key-by-key basis
• onClickUser: invoked when the onClick event is received
• onBlurUser: invoked when the onBlur event is received
• onFocusUser: invoked when the onFocus event is received
• onKeyUpUser: invoked when the onKeyUp event is received