You want to validate an email address on your Adobe LiveCycle Designer Form ? No problem, just follow the following small tutorial.

Create a new Form. Add a Text Field to it. (so far so good ;-) ) Go into the Object –> Value window of the Text field Choose –> validation Script Message (error) Create a nice little message saying that the mail address is wrong. Go into the Script Editor (CTRL-SHIFT-F5). Put in this little script as a JavaSscipt (run at Client)

var r = new RegExp();   
var result = r.test(this.rawValue);   
if (result == true)   

Add a button that validates your form like the Email Submit Button.

And test it ! ;-)