diff --git a/scripts/webadvisor_tokenidx.js b/scripts/webadvisor_tokenidx.js
new file mode 100644
--- /dev/null
+++ b/scripts/webadvisor_tokenidx.js
@@ -0,0 +1,70 @@
+/*
+ * Assumes that WebAdvisor_scripts.js for WebAdvisor-2.x is loaded,
+ * displayFormHTML() or something was called and thus
+ * readURLParameters() was called. We attempt to extract TOKENIDX and
+ * asynchronously inform slate_permutate about it. We currently assume
+ * we're on a login form too.
+ */
+
+var slate_permutate_input_login;
+
+(function() {
+		var slate_permutate_onload = function() {
+
+				/*
+				 * Override the login form's submission handler to catch the
+				 * case where we're still trying to load the TOKENIDX or
+				 * something else.
+				 */
+				var inputs = document.getElementsByTagName('input');
+				for (var i = 0; i < inputs.length; i ++)
+				{
+						slate_permutate_input_login = inputs.item(i);
+						if (slate_permutate_input_login.getAttribute('name') == 'SUBMIT2')
+								break;
+				}
+				slate_permutate_input_login.setAttribute('value', 'Discovering TOKENIDX...');
+				slate_permutate_input_login.setAttribute('disabled', 'disabled');
+
+				/*
+				 * Discover the TOKENIDX if it's available.
+				 */
+				if (containsParameter(g_tokenIdx))
+				{
+						var TOKENIDX = getURLParameter(g_tokenIdx);
+						var myscript = document.createElement('script');
+						myscript.setAttribute('type', 'text/javascript');
+						myscript.setAttribute('src', decodeURIComponent(getURLParameter('SP_CALLBACK')) + 'callback=slate_permutate_token_callback&TOKENIDX=' + TOKENIDX);
+						document.getElementsByTagName('head').item(0).appendChild(myscript);
+				}
+				else
+				{
+						alert('Unable to discover TOKENIDX. You must register manually.');
+				}
+		}
+
+		/*
+		 * Register to run after either of getWindowHTML(),
+		 * setWindowHTML(), or displayFormHTML() have been run. These are
+		 * run after onload="", so they are required if we're to wait for
+		 * the DOM to load...
+		 */
+		var funcs = ['getWindowHTML', 'setWindowHTML', 'displayFormHTML'];
+		for (var i = 0; i < funcs.length; i ++)
+		{
+				var func = window[funcs[i]];
+				window[funcs[i]] = function() {
+						func();
+						slate_permutate_onload();
+				};
+		}
+})();
+
+function slate_permutate_token_callback(result)
+{
+		if (result)
+		{
+				slate_permutate_input_login.setAttribute('value', 'LOG IN');
+				slate_permutate_input_login.removeAttribute('disabled');
+		}
+}