diff --git a/js/ui/mxgraph/src/js/util/mxUrlConverter.js b/js/ui/mxgraph/src/js/util/mxUrlConverter.js
new file mode 100644
index 0000000..6aae50e
--- /dev/null
+++ b/js/ui/mxgraph/src/js/util/mxUrlConverter.js
@@ -0,0 +1,151 @@
+/**
+ * Copyright (c) 2006-2015, JGraph Ltd
+ * Copyright (c) 2006-2015, Gaudenz Alder
+ */
+/**
+ *
+ * Class: mxUrlConverter
+ * 
+ * Converts relative and absolute URLs to absolute URLs with protocol and domain.
+ */
+var mxUrlConverter = function()
+{
+	// Empty constructor
+};
+
+/**
+ * Variable: enabled
+ * 
+ * Specifies if the converter is enabled. Default is true.
+ */
+mxUrlConverter.prototype.enabled = true;
+
+/**
+ * Variable: baseUrl
+ * 
+ * Specifies the base URL to be used as a prefix for relative URLs.
+ */
+mxUrlConverter.prototype.baseUrl = null;
+
+/**
+ * Variable: baseDomain
+ * 
+ * Specifies the base domain to be used as a prefix for absolute URLs.
+ */
+mxUrlConverter.prototype.baseDomain = null;
+
+/**
+ * Function: updateBaseUrl
+ * 
+ * Private helper function to update the base URL.
+ */
+mxUrlConverter.prototype.updateBaseUrl = function()
+{
+	this.baseDomain = location.protocol + '//' + location.host;
+	this.baseUrl = this.baseDomain + location.pathname;
+	var tmp = this.baseUrl.lastIndexOf('/');
+	
+	// Strips filename etc
+	if (tmp > 0)
+	{
+		this.baseUrl = this.baseUrl.substring(0, tmp + 1);
+	}
+};
+
+/**
+ * Function: isEnabled
+ * 
+ * Returns <enabled>.
+ */
+mxUrlConverter.prototype.isEnabled = function()
+{
+	return this.enabled;
+};
+
+/**
+ * Function: setEnabled
+ * 
+ * Sets <enabled>.
+ */
+mxUrlConverter.prototype.setEnabled = function(value)
+{
+	this.enabled = value;
+};
+
+/**
+ * Function: getBaseUrl
+ * 
+ * Returns <baseUrl>.
+ */
+mxUrlConverter.prototype.getBaseUrl = function()
+{
+	return this.baseUrl;
+};
+
+/**
+ * Function: setBaseUrl
+ * 
+ * Sets <baseUrl>.
+ */
+mxUrlConverter.prototype.setBaseUrl = function(value)
+{
+	this.baseUrl = value;
+};
+
+/**
+ * Function: getBaseDomain
+ * 
+ * Returns <baseDomain>.
+ */
+mxUrlConverter.prototype.getBaseDomain = function()
+{
+	return this.baseDomain;
+},
+
+/**
+ * Function: setBaseDomain
+ * 
+ * Sets <baseDomain>.
+ */
+mxUrlConverter.prototype.setBaseDomain = function(value)
+{
+	this.baseDomain = value;
+},
+
+/**
+ * Function: isRelativeUrl
+ * 
+ * Returns true if the given URL is relative.
+ */
+mxUrlConverter.prototype.isRelativeUrl = function(url)
+{
+	return url.substring(0, 2) != '//' && url.substring(0, 7) != 'http://' && url.substring(0, 8) != 'https://' && url.substring(0, 10) != 'data:image';
+};
+
+/**
+ * Function: convert
+ * 
+ * Converts the given URL to an absolute URL with protol and domain.
+ * Relative URLs are first converted to absolute URLs.
+ */
+mxUrlConverter.prototype.convert = function(url)
+{
+	if (this.isEnabled() && this.isRelativeUrl(url))
+	{
+		if (this.getBaseUrl() == null)
+		{
+			this.updateBaseUrl();
+		}
+		
+		if (url.charAt(0) == '/')
+		{
+			url = this.getBaseDomain() + url;
+		}
+		else
+		{
+			url = this.getBaseUrl() + url;
+		}
+	}
+	
+	return url;
+};