Error Dialog (js)

/* Send message
 * min Java 7 (1.7)
 */
try{
new java.lang.Thread(new java.lang.Runnable({

run : function(){

var JOptionPane = Packages.javax.swing.JOptionPane;

var options = ["OK"];           // Option Array
var text = "FATALER FEHLER!";   // Text
var title = "Windows";          // Title
   JOptionPane.showOptionDialog(null,
                   text, title,
                   JOptionPane.ERROR_MESSAGE,
                   0,
                   null,
                   options,
                   options[0]);
}
})).start();
} catch(e){
    e.printStackTrace();
}