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package{
import flash.display.Sprite;
public class Main extends Sprite{
public function Main(){
var sUsername:String = tUsername.text;
try {
checkUsername(sUsername);
}
catch (erObject:Error) {
trace("An error was thrown.");
}
}
function checkUsername(sUsernameParam:String) {
if(sUsernameParam == "") {
throw new Error();
}
}
}
}
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