#18 1115480 TextBoxTester postback support

[Peijen Lin]

This is pretty simple, I just added one line of code.

I assign the copyright to these files to Brian Knowles
and Jim Shore.

[Peijen Lin]

Logged In: YES
user_id=1206601

Here is the test case for the change. I have to modify
NUnitAspTestPages/AspTester/TextBoxTestPage for the test to
work, but I couldn't generate a patch for whatever reason.

Here are the changes made to TextBoxTestPage:
- Set AutoPostBack to true for textBox and multiline
- Replaced postback button with postback TextBox
- Set AutoPostBack to true for postback
- Added this line of code to InitializeComponent()
this.postback.TextChanged += new
System.EventHandler(this.postBack_TextChanged);
- Added this function
private void postBack_TextChanged(object sender,
EventArgs e)
{
this.postback.Text = "postBack";
}