diff --git a/expert.html b/expert.html
index 816cf26..58d1092 100644
--- a/expert.html
+++ b/expert.html
@@ -85,14 +85,17 @@ $().ready(function(){
   <input type="checkbox" name="0" id="updateShow0" onchange="updateShow(this.name,this.checked)" />(metal)
   <input type="checkbox" name="2" id="updateShow2" onchange="updateShow(this.name,this.checked)" />(protection)
   </form>
-  <form>
-  <input type="button" value="Hide Chip Layout" onclick="updateChipLayoutVisibility(false)" />
-  <input type="button" value="Clear Highlighting" onclick="clearHighlight()" />
+  <form action="javascript:hiliteNodeList();" />
+  <input type="button" value="Highlight:" onclick="hiliteNodeList();" />
+  <input type="text" id="HighlightThese" name="HighlightThese" value="" />
+  <input type="button" value="Clear Highlighting" onclick="clearHighlight();" />
   <span class="animatebox">
     Animate during simulation:
     <input type="checkbox" id="animateModeCheckbox" onchange="updateChipLayoutAnimation(this.checked)" 
     /></span>
-  &nbsp;
+  </form>
+  <form>
+  <input type="button" value="Hide Chip Layout" onclick="updateChipLayoutVisibility(false)" />
   <a href="" id="linkHere" >Link to this location</a>
   </form>
 </div>
diff --git a/expertWires.js b/expertWires.js
index 1a9ae80..db7f2e9 100644
--- a/expertWires.js
+++ b/expertWires.js
@@ -279,6 +279,39 @@ function recenter(){
 	document.getElementById('linkHere').href=location.pathname+"?"+whereAmIAsQuery();
 }
 
+var highlightThese;
+
+// flash some set of nodes according to user input
+function hiliteNodeList(){
+	var tmplist = document.getElementById('HighlightThese').value.split(/[\s,]+/);
+	if(tmplist.length==0){
+		// request to highlight nothing, so switch off any signal highlighting
+		hiliteNode(-1);
+		return;
+	}
+	highlightThese = [];
+	for(var i=0;i<tmplist.length;i++){
+		// get a node number from a signal name or a node number
+		var name = tmplist[i];
+		var value = parseInt(tmplist[i]);
+		if((value!=NaN) && (typeof nodes[name] != "undefined")) {
+			highlightThese.push(value);
+		} else if(typeof nodenames[name] != "undefined") {
+			highlightThese.push(nodenames[name]);
+		}
+		// invalid input: how to tell the user?
+	}
+	if(highlightThese.length==0){
+		// all input rejected: how to tell the user?
+		return;
+	}
+	clearHighlight();  // nullify the simulation overlay (orange/purple)
+	hiliteNode(-1);    // unhighlight all nodes
+	setTimeout("hiliteNode(highlightThese);", 400);
+	setTimeout("hiliteNode(-1);", 800);
+	setTimeout("hiliteNode(highlightThese);", 1200);
+}
+
 function handleClick(e){
 	var x = localx(hilite, e.clientX)/zoom;
 	var y = localy(hilite, e.clientY)/zoom;