Add multi-region launcher support

Add custom launcher as well as support for both the original TW and JP
launchers.

www/erupe/js/login.js

@@ -0,0 +1,38 @@
+function createErrorAlert(message) {
+	parent.postMessage(message, "*");
+}
+
+
+// Function to continually check if we got a login result yet,
+// then navigating to the character selection if we did.
+function checkAuthResult() {
+    var loginResult = window.external.getLastAuthResult();
+    console.log('|' + loginResult + '|');
+    if(loginResult == "AUTH_PROGRESS") {
+        setTimeout(checkAuthResult, 1500);
+    } else if (loginResult == "AUTH_SUCCESS") {
+        window.location.href = 'charsel.html'
+    } else {
+        createErrorAlert("Error logging in!");
+    }
+}
+
+$(function() {
+
+    // Login form submission.
+    $("#loginform").submit(function(e){
+        e.preventDefault();
+
+        username = $("#username").val();
+        password = $("#password").val();
+
+        try{
+            window.external.loginCog(username, password, password);
+        } catch(e){
+            createErrorAlert("Error on loginCog: " + e);
+        }
+
+        checkAuthResult();
+    });
+
+});