local MAX_REALM_CATEGORY_TABS = 8;
 
 function RealmWizard_OnLoad(self)
 	SetLoginScreenModel(RealmWizard);
 end
 
 function RealmWizard_OnShow(self)
 	RealmWizardLogo:SetTexture(EXPANSION_LOGOS[GetClientDisplayExpansionLevel()]);
 
 	self:SetSequence(0);
 	RealmWizardGameTypeButton1:Click(1);
 	if ( not RealmWizard.selectedCategory ) then
 		RealmWizardSuggest:Disable();
 	end
 	RealmWizard_UpdateCategories(GetRealmCategories());
 	CHARACTER_SELECT_BACK_FROM_CREATE = false;
 end
 
 function RealmWizard_OnHide(self)
 	StopAllSFX( 1.0 );
 end
 
 function RealmWizard_UpdateCategories(...)
 	local numTabs = select("#", ...);
 	local button, buttonText;
 	local numCategoriesShown = 0;
 
 	local categoryIndex = 1;
 	for i=1, MAX_REALM_CATEGORY_TABS do
 		button = _G["RealmWizardLocationButton"..i];
 		buttonText = _G["RealmWizardLocationButton"..i.."Text"];
 		while (IsTournamentRealmCategory(categoryIndex)) do
 			categoryIndex = categoryIndex + 1;
 			if (categoryIndex > numTabs) then
 				break;
 			end
 		end
 		if ( categoryIndex <= numTabs ) then
 			buttonText:SetText(select(categoryIndex, ...));
 			button.categoryIndex = categoryIndex;
 			if ( categoryIndex == RealmWizard.selectedCategory ) then
-				button:SetChecked(1);
+				button:SetChecked(true);
 			else
-				button:SetChecked(nil);
+				button:SetChecked(false);
 			end
 			button:Show();
 			numCategoriesShown = numCategoriesShown + 1;
 			categoryIndex = categoryIndex + 1;
 		else
 			button:Hide();
 		end
 	end
 	RealmWizardLocation:SetHeight(numCategoriesShown * 28 + RealmWizardLocationLabelDescription:GetHeight() + 50);
 end
 
 function RealmWizardLocationButton_OnClick(id)
 	RealmWizardSuggest:Enable();
 	RealmWizard.selectedCategory = id;
 	RealmWizard_UpdateCategories(GetRealmCategories());
 end
 
 -- Wrapper function so it can be included as a dialog function
 function RealmWizard_SetRealm()
 	ChangeRealm(RealmWizard.suggestedCategory, RealmWizard.suggestedID);
 end
 
 function RealmWizard_Exit()
 	DisconnectFromServer();
 	SetGlueScreen("login");
 end
 
 function RealmWizard_OnKeyDown(key)
 	if ( key == "ESCAPE" ) then
 		RealmWizard_Exit();
 	elseif ( key == "ENTER" ) then
 		RealmWizardSuggest:Click();
 	elseif ( key == "PRINTSCREEN" ) then
 		Screenshot();
 	end
 end