Action Region, Required Fields and HTML5 Controller

RequiredCtrl.cls

public with sharing class RequiredCtrl 
{
	public List<Row> rows {get; set;}
	public String name {get; set;}
	public Account acc {get; set;}
	
	public RequiredCtrl()
	{
		rows=new List<Row>();
		rows.add(new Row());
	}
	
	public void addRow()
	{
		rows.add(new Row());
	}
	
	public void save()
	{
		// fake save method - just returns to the page
	}
	
	public class Row
	{
		public String val1 {get; set;}
		public String val2 {get; set;}
		public String val3 {get; set;}
	}
}