ActionScript 2.0 Language Reference - Adobe Help and Support

Example
In the following example, the text field focuses on the username_txt text field when it is
running in a browser window. If the user does not fill in one of the required text fields
(username_txt and password_txt), the cursor automatically focuses in the text field that's
missing data. For example, if the user does not type anything into the username_txt text
field and clicks the submit button, an error message appears and the cursor focuses in the
username_txt text field.
this.createTextField("status_txt", this.getNextHighestDepth(), 100, 70,
100, 22);
this.createTextField("username_txt", this.getNextHighestDepth(), 100, 100,
100, 22);
this.createTextField("password_txt", this.getNextHighestDepth(), 100, 130,
100, 22);
this.createEmptyMovieClip("submit_mc", this.getNextHighestDepth());
submit_mc.createTextField("submit_txt", this.getNextHighestDepth(), 100,
160, 100, 22);
submit_mc.submit_txt.autoSize = "center";
submit_mc.submit_txt.text = "Submit";
submit_mc.submit_txt.border = true;
submit_mc.onRelease = checkForm;
username_txt.border = true;
password_txt.border = true;
username_txt.type = "input";
password_txt.type = "input";
password_txt.password = true;
Selection.setFocus("username_txt");
//
function checkForm():Boolean {
if (username_txt.text.length == 0) {
status_txt.text = "fill in username";
Selection.setFocus("username_txt");
return false;
}
if (password_txt.text.length == 0) {
status_txt.text = "fill in password";
Selection.setFocus("password_txt");
return false;
}
status_txt.text = "success!";
Selection.setFocus(null);
return true;
}
The MovieClip.getNextHighestDepth() method used in this example requires Flash Player
7 or later. If your SWF file includes a version 2 component, use the version 2 components'
DepthManager class instead of the MovieClip.getNextHighestDepth() method.
Selection 1093