diff --git a/js/BoxPage.js b/js/BoxPage.js
index 467db7d..021c591 100644
--- a/js/BoxPage.js
+++ b/js/BoxPage.js
@@ -44,6 +44,10 @@
 	$.mobile.document.on( "pagebeforeshow", PAGE_ID, function( event, data ) {
 		console.log("Box page pagebeforeshow");
 		_boxData = d3d.util.getPageParams(PAGE_ID);
+		if(_boxData === undefined) { 
+			$.mobile.changePage("#boxes");
+			return;
+		}
 		var boxURL = "http://"+_boxData.localip;
 		//console.log("  _boxData: ",_boxData);
 		
diff --git a/js/ConnectingToNetworkPage.js b/js/ConnectingToNetworkPage.js
index 123b3f1..14bfa6a 100644
--- a/js/ConnectingToNetworkPage.js
+++ b/js/ConnectingToNetworkPage.js
@@ -38,6 +38,10 @@
 	$.mobile.document.on( "pagebeforeshow", PAGE_ID, function( event, data ) {
 		console.log("Connecting to network page pagebeforeshow");
 		_pageData = d3d.util.getPageParams(PAGE_ID);
+		if(_pageData === undefined) { 
+			$.mobile.changePage("#boxes");
+			return;
+		}
 		var boxURL = "http://"+_pageData.localip;
 		
 		var form = data.prevPage.find("form");
diff --git a/js/JoinNetworkPage.js b/js/JoinNetworkPage.js
index ef51dea..c250aca 100644
--- a/js/JoinNetworkPage.js
+++ b/js/JoinNetworkPage.js
@@ -29,6 +29,10 @@
 	$.mobile.document.on( "pagebeforeshow", PAGE_ID, function( event, data ) {
 		console.log("Join network page pagebeforeshow");
 		_boxData = d3d.util.getPageParams(PAGE_ID);
+		if(_boxData === undefined) { 
+			$.mobile.changePage("#boxes");
+			return;
+		}
 		var boxURL = "http://"+_boxData.localip;
 		console.log("  _boxData: ",_boxData);
 		
diff --git a/js/JoinSecuredNetworkPage.js b/js/JoinSecuredNetworkPage.js
index dd63490..ad0412d 100644
--- a/js/JoinSecuredNetworkPage.js
+++ b/js/JoinSecuredNetworkPage.js
@@ -34,6 +34,10 @@
 	$.mobile.document.on( "pagebeforeshow", PAGE_ID, function( event, data ) {
 		console.log(PAGE_ID+" pagebeforeshow");
 		_pageData = d3d.util.getPageParams(PAGE_ID);
+		if(_pageData === undefined) { 
+			$.mobile.changePage("#boxes");
+			return;
+		}
 		console.log("  _pageData: ",_pageData);
 		_title.text("Join "+_pageData.ssid);
 		_form.attr("id","Join "+_pageData.ssid);
diff --git a/js/main.js b/js/main.js
index 3171065..62b3d36 100644
--- a/js/main.js
+++ b/js/main.js
@@ -105,11 +105,11 @@ d3d.util = {
 	// To get to url parameters we need the url
 	// only pagecontainer events contain url's
 	// we parse the parameters and store them in a global object
+	d3d.pageParams = {};
 	$.mobile.document.on( "pagebeforechange", function( event, data ) {
 		if (typeof data.toPage !== "string") { return; }
 		var url = d3d.util.parseURL(data.toPage);
 		if(url.parameters === undefined) { return; }
-		if(!d3d.pageParams) { d3d.pageParams = {}; }
 		d3d.pageParams[url.hash] = url.parameters;
 		
 		// let jQuery mobile navigate to page (providing only the page id so it understands)