Zapatec DHTML Form Widget - Submit form to server using AJAX

This demo uses the winxp theme.
This form uses the Zapatec Transport module to send its content to server without refreshing the page.
Specify asyncSubmitFunc config parameter in Zapatec.Form constructor to determine that you want to submit form using AJAX.
asyncSubmitFunc must be a reference to function. This function will be called after successful form submit. You can use it for hiding <FORM> element, for example.
While submiting, all submit buttons in a form will be disabled.
Server must respond with JSON object of following structure:
```
{
	"success": true,
	"callbackArgs": {...}
}
```
If callbackArgs are given - they will be passed to asyncSubmitFunc function.
If submit was unsuccessful then following result will be returned
```
{
	"success": false,
	"generalError":	"These Login Name and Email Address already exist in database",
	"fieldErrors": {
		"name": "Please enter another Login Name"
	}
}
```
generalError will be displayed using submitErrorFunc function and error message for each field will be displayed as well.