diff --git a/brozzler/behaviors.d/simpledo.js.template b/brozzler/behaviors.d/simpledo.js.template
deleted file mode 100644
index cd0216d..0000000
--- a/brozzler/behaviors.d/simpledo.js.template
+++ /dev/null
@@ -1,140 +0,0 @@
-/*
- * 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/js-templates/simpledo.js.j2 b/brozzler/js-templates/simpledo.js.j2
index 17309e0..14580c1 100644
--- a/brozzler/js-templates/simpledo.js.j2
+++ b/brozzler/js-templates/simpledo.js.j2
@@ -22,20 +22,16 @@ var umbraBehavior = {
 	IDLE_TIMEOUT_SEC : 10,
 	idleSince : null,
 
-	// https://github.com/jquery/jquery/blob/master/src/css/hiddenVisibleSelectors.js
-	// n.b. returns true for elements with visibility:hidden, which occupy
-	// screen real estate but are not visible, or clickable with the ui
-	isVisible : function(elem) {
-		return !!(elem.offsetWidth || elem.offsetHeight || elem.getClientRects().length);
-	},
-
 	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}};
+		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);
@@ -50,9 +46,6 @@ var umbraBehavior = {
 			var doTargets = documents[j].querySelectorAll(cssSelector);
 
 			for ( var i = 0; i < doTargets.length; i++) {
-				if (!this.isVisible(doTargets[i])) {
-					continue;
-				}
 				if (doTargets[i].umbraDone && !doUntilTimeout) {
 					continue;
 				}