diff --git a/brozzler/behaviors.d/simpledo.js.template b/brozzler/behaviors.d/simpledo.js.template
new file mode 100644
index 0000000..cd0216d
--- /dev/null
+++ b/brozzler/behaviors.d/simpledo.js.template
@@ -0,0 +1,140 @@
+/*
+ * brozzler/behaviors.d/simpledo.js.in - simpledo behavior template,
+ * acting on elements matching templatized css selector,
+ * based on simpleclicks.js.template and mouseovers.js.template
+ *
+ * Copyright (C) 2016 Internet Archive
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+var umbraBehavior = {
+	IDLE_TIMEOUT_SEC : 10,
+	idleSince : null,
+
+	intervalFunc : function() {
+		var didSomething = false;
+		var somethingLeftBelow = false;
+		var somethingLeftAbove = false;
+		var cssSelector = "${sdo_css_selector}";
+		var doAction = "${sdo_action}"; // currently supports click, mouseover
+		var doUntilTimeout = "${sdo_until_hard_timeout}";
+
+		//handle Python to JavaScript boolean conversion
+		doUntilTimeout == "True" ? doUntilTimeout = true : doUntilTimeout = false;
+
+		var iframes = document.querySelectorAll("iframe");
+		var documents = Array(iframes.length + 1);
+		documents[0] = document;
+
+		for (var i = 0; i < iframes.length; i++) {
+			documents[i+1] = iframes[i].contentWindow.document;
+		}
+
+		for (var j = 0; j < documents.length; j++) {
+
+			var doTargets = documents[j].querySelectorAll(cssSelector);
+
+			for ( var i = 0; i < doTargets.length; i++) {
+				if (doTargets[i].umbraDone && !doUntilTimeout) {
+					continue;
+				}
+
+				var where = this.aboveBelowOrOnScreen(doTargets[i]);
+
+				if (where == 0) {
+					console.log("doing " + doAction + doTargets[i].outerHTML);
+					// do mouse over event on target
+					// since some urls are requsted only on
+					// this event - see
+					// https://webarchive.jira.com/browse/AITFIVE-451
+					var mouseOverEvent = document.createEvent('Events');
+					mouseOverEvent.initEvent('mouseover',true, false);
+					doTargets[i].dispatchEvent(mouseOverEvent);
+
+					if (doAction == 'click') {
+						doTargets[i].click();
+					} // add new do's here!
+
+					didSomething = true;
+					this.idleSince = null;
+					doTargets[i].umbraDone = true;
+
+					break; // break from doTargets loop (not from iframe loop)
+				} else if (where > 0) {
+					somethingLeftBelow = true;
+				} else if (where < 0) {
+					somethingLeftAbove = true;
+				}
+			}
+		}
+
+		if (!didSomething) {
+			if (somethingLeftAbove) {
+				// console.log("scrolling UP because everything on this screen has been done but we missed something above");
+				window.scrollBy(0, -500);
+				this.idleSince = null;
+			} else if (somethingLeftBelow) {
+				// console.log("scrolling because everything on this screen has been done but there's more below");
+				window.scrollBy(0, 200);
+				this.idleSince = null;
+			} else if (window.scrollY + window.innerHeight < document.documentElement.scrollHeight) {
+				// console.log("scrolling because we're not to the bottom yet");
+				window.scrollBy(0, 200);
+				this.idleSince = null;
+			} else if (this.idleSince == null) {
+				this.idleSince = Date.now();
+			}
+		}
+
+		if (!this.idleSince) {
+			this.idleSince = Date.now();
+		}
+	},
+
+	start : function() {
+		var that = this;
+		this.intervalId = setInterval(function() {
+			that.intervalFunc()
+		}, 250);
+	},
+
+	isFinished : function() {
+		if (this.idleSince != null) {
+			var idleTimeMs = Date.now() - this.idleSince;
+			if (idleTimeMs / 1000 > this.IDLE_TIMEOUT_SEC) {
+				clearInterval(this.intervalId);
+				return true;
+			}
+		}
+		return false;
+	},
+
+	aboveBelowOrOnScreen : function(e) {
+		var eTop = e.getBoundingClientRect().top;
+		if (eTop < window.scrollY) {
+			return -1; // above
+		} else if (eTop > window.scrollY + window.innerHeight) {
+			return 1; // below
+		} else {
+			return 0; // on screen
+		}
+	},
+};
+
+// Called from outside of this script.
+var umbraBehaviorFinished = function() {
+	return umbraBehavior.isFinished()
+};
+
+umbraBehavior.start();
diff --git a/brozzler/behaviors.yaml b/brozzler/behaviors.yaml
index 1130bcc..3f57bfa 100644
--- a/brozzler/behaviors.yaml
+++ b/brozzler/behaviors.yaml
@@ -1,7 +1,7 @@
 #
 # brozzler/behaviors.yaml - behavior configuration
 #
-# Copyright (C) 2014-2016 Internet Archive
+# Copyright (C) 2014-2017 Internet Archive
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -17,86 +17,85 @@
 #
 
 # first matched behavior is used, so order matters here
--
-  url_regex: '^https?://(?:www\.)?facebook\.com/.*$'
-  behavior_js_template: facebook.js
-  request_idle_timeout_sec: 30
--
-  url_regex: '^https?://(?:www\.)?marquette\.edu/.*$'
-  behavior_js_template: marquette_edu.js
-  request_idle_timeout_sec: 10
--
-  url_regex: '^https?://(?:www\.)?vimeo\.com/.*$'
-  behavior_js_template: vimeo.js
-  request_idle_timeout_sec: 10
--
-  url_regex: '^https?://(?:www\.)?psu24.psu.edu/.*$'
-  behavior_js_template: psu24.js
-  request_idle_timeout_sec: 10
--
-  url_regex: '^https?://(?:www\.)?instagram\.com/.*$'
-  behavior_js_template: instagram.js
-  request_idle_timeout_sec: 10
--
-  url_regex: '^https?://(?:www\.)?brooklynmuseum\.org/exhibitions/.*$'
-  behavior_js_template: simpleclicks.js.j2
-  default_parameters:
-     click_css_selector: img.img-responsive
-     click_until_hard_timeout: False
-  request_idle_timeout_sec: 10
-- # acalog https://webarchive.jira.com/browse/ARI-3775
-  url_regex: '^https?://.*[?&]catoid=[^?]*$'
-  behavior_js_template: simpleclicks.js.j2
-  default_parameters:
-     click_css_selector: a[onclick]
-     click_until_hard_timeout: False
-  request_idle_timeout_sec: 10
-- # https://webarchive.jira.com/browse/ARI-3956
-  url_regex: '^https?://(?:www\.)?usask.ca/.*$'
-  behavior_js_template: simpleclicks.js.j2
-  default_parameters:
-     click_css_selector: a[id='feature-next']
-     click_until_hard_timeout: False
-  request_idle_timeout_sec: 10
-- # https://webarchive.jira.com/browse/AITFIVE-451
-  url_regex: '^https?://(?:www\.)?soundcloud.com/.*$'
-  behavior_js_template: simpleclicks.js.j2
-  default_parameters:
-     click_css_selector: button.sc-button-play, button.playButton
-     click_until_hard_timeout: False
-  request_idle_timeout_sec: 10
-- # https://webarchive.jira.com/browse/AITFIVE-463
-  url_regex: '^https?://(?:www\.)?christophercerrone.com/.*$'
-  behavior_js_template: simpleclicks.js.j2
-  default_parameters:
-     click_css_selector: button.playButton.medium
-     click_until_hard_timeout: False
-  request_idle_timeout_sec: 10
-- # https://webarchive.jira.com/browse/ARI-4690
-  url_regex: '^https?://(?:www\.)?youtube.com/.*$'
-  behavior_js_template: simpleclicks.js.j2
-  default_parameters:
-     click_css_selector: span.load-more-text
-     click_until_hard_timeout: False
-  request_idle_timeout_sec: 10
-- # https://webarchive.jira.com/browse/ARI-4725
-  url_regex: '^https?://(?:www\.)?moma.org/.*$'
-  behavior_js_template: simpleclicks.js.j2
-  default_parameters:
-     click_css_selector: button[data-more-results-bottom-button]
-     click_until_hard_timeout: True
-  request_idle_timeout_sec: 10
-- # https://webarchive.jira.com/browse/ARI-4692
-  url_regex: '^https?://(?:www\.)?fec.gov/data/.*$'
-  behavior_js_template: fec_gov.js
-  request_idle_timeout_sec: 10
-- url_regex: '^https?://(?:www\.)?news\.com\.au/.*$'
-  behavior_js_template: mouseovers.js.j2
-  default_parameters:
-     mouseover_css_selector: .menu-item a
-     mouseover_until_hard_timeout: False
-  request_idle_timeout_sec: 10
-- # default fallback behavior
-  url_regex: '^.*$'
-  request_idle_timeout_sec: 10
-  behavior_js_template: default.js
+behaviors:
+ -
+   url_regex: '^https?://(?:www\.)?facebook\.com/.*$'
+   behavior_js_template: facebook.js.template
+   # default_parameters:
+   #    parameter_username: jdoe@example.com
+   #    parameter_password: abcd1234
+   request_idle_timeout_sec: 30
+ -
+   url_regex: '^https?://(?:www\.)?marquette\.edu/.*$'
+   behavior_js: marquette_edu.js
+   request_idle_timeout_sec: 10
+ -
+   url_regex: '^https?://(?:www\.)?vimeo\.com/.*$'
+   behavior_js: vimeo.js
+   request_idle_timeout_sec: 10
+ -
+   url_regex: '^https?://(?:www\.)?psu24.psu.edu/.*$'
+   behavior_js: psu24.js
+   request_idle_timeout_sec: 10
+ -
+   url_regex: '^https?://(?:www\.)?instagram\.com/.*$'
+   behavior_js: instagram.js
+   request_idle_timeout_sec: 10
+ -
+   url_regex: '^https?://(?:www\.)?brooklynmuseum\.org/exhibitions/.*$'
+   behavior_js_template: simpleclicks.js.template
+   default_parameters:
+      click_css_selector: img.img-responsive
+   request_idle_timeout_sec: 10
+ - # acalog https://webarchive.jira.com/browse/ARI-3775
+   url_regex: '^https?://.*[?&]catoid=[^?]*$'
+   behavior_js_template: simpleclicks.js.template
+   default_parameters:
+      click_css_selector: a[onclick]
+   request_idle_timeout_sec: 10
+ - # https://webarchive.jira.com/browse/ARI-3956
+   url_regex: '^https?://(?:www\.)?usask.ca/.*$'
+   behavior_js_template: simpleclicks.js.template
+   default_parameters:
+      click_css_selector: a[id='feature-next']
+   request_idle_timeout_sec: 10
+ - # https://webarchive.jira.com/browse/AITFIVE-451
+   url_regex: '^https?://(?:www\.)?soundcloud.com/.*$'
+   behavior_js_template: simpledo.js.template
+   default_parameters:
+      sdo_css_selector: button.sc-button-play, button.playButton
+      sdo_action: click
+   request_idle_timeout_sec: 10
+ - # https://webarchive.jira.com/browse/AITFIVE-463
+   url_regex: '^https?://(?:www\.)?christophercerrone.com/.*$'
+   behavior_js_template: simpleclicks.js.template
+   default_parameters:
+      click_css_selector: button.playButton.medium
+   request_idle_timeout_sec: 10
+ - # https://webarchive.jira.com/browse/ARI-4690
+   url_regex: '^https?://(?:www\.)?youtube.com/.*$'
+   behavior_js_template: simpleclicks.js.template
+   default_parameters:
+      click_css_selector: span.load-more-text
+   request_idle_timeout_sec: 10
+ - # https://webarchive.jira.com/browse/ARI-4725
+   url_regex: '^https?://(?:www\.)?moma.org/.*$'
+   behavior_js_template: simpleclicks.js.template
+   default_parameters:
+      click_css_selector: button[data-more-results-bottom-button]
+      click_until_hard_timeout: True
+   request_idle_timeout_sec: 10
+ - # https://webarchive.jira.com/browse/ARI-4692
+   url_regex: '^https?://(?:www\.)?fec.gov/data/.*$'
+   behavior_js: fec_gov.js
+   request_idle_timeout_sec: 10
+ - url_regex: '^https?://(?:www\.)?news\.com\.au/.*$'
+   behavior_js_template: simpledo.js.template
+   default_parameters:
+      sdo_css_selector: .menu-item a
+      sdo_action: mouseover
+   request_idle_timeout_sec: 10
+ - # default fallback behavior
+   url_regex: '^.*$'
+   request_idle_timeout_sec: 10
+   behavior_js: default.js