Using IsValid.js to Validate Data on the Client

The IsValid.js file handles client-side data validation for the PT application. Activity.htm, ActivityType.htm, Group.htm, Location.htm, and Person.htm call the validateForm function in IsValid.js from their respective update functions. IsValid.js contains pattern definitions against which data is validated. The following topics describe how the PT application validates data using IsValid.js:

• Skipping Data Validation
• Validating a Required Field
• Writing Patterns for Regular Expressions
• Implementing Pattern Matching
• Coding the Trim Function

The following topics also include information on implementing data validation:

• Defining Custom Attributes describes the validator and required attributes.
• Implementing Custom Validation Functions describes the special data validation functions that apply to the Group form.
• Localized Messages from Lingo.xml discusses the use of localized message text in data validation alerts.