diff --git a/core/modules/utils.dom.js b/core/modules/utils.dom.js
new file mode 100644
index 000000000..dd83c5041
--- /dev/null
+++ b/core/modules/utils.dom.js
@@ -0,0 +1,78 @@
+/*\
+title: $:/core/modules/utils.dom.js
+type: application/javascript
+module-type: utils
+
+Various static DOM-related utility functions.
+
+\*/
+(function(){
+
+/*jslint node: true, browser: true */
+/*global $tw: false */
+"use strict";
+
+/*
+Determines whether element 'a' contains element 'b'
+Code thanks to John Resig, http://ejohn.org/blog/comparing-document-position/
+*/
+exports.domContains = function(a,b) {
+	return a.contains ?
+		a != b && a.contains(b) :
+		!!(a.compareDocumentPosition(b) & 16);
+};
+
+exports.hasClass = function(el,className) {
+	return el.className.split(" ").indexOf(className) !== -1;
+};
+
+exports.addClass = function(el,className) {
+	var c = el.className.split(" ");
+	if(c.indexOf(className) === -1) {
+		c.push(className);
+	}
+	el.className = c.join(" ");
+};
+
+exports.removeClass = function(el,className) {
+	var c = el.className.split(" "),
+		p = c.indexOf(className);
+	if(p !== -1) {
+		c.splice(p,1);
+		el.className = c.join(" ");
+	}
+};
+
+exports.toggleClass = function(el,className,status) {
+	if(status === undefined) {
+		status = !exports.hasClass(el,className);
+	}
+	if(status) {
+		exports.addClass(el,className);
+	} else {
+		exports.removeClass(el,className);
+	}
+};
+
+exports.applyStyleSheet = function(id,css) {
+	var el = document.getElementById(id);
+	if(document.createStyleSheet) { // Older versions of IE
+		if(el) {
+			el.parentNode.removeChild(el);
+		}
+		document.getElementsByTagName("head")[0].insertAdjacentHTML("beforeEnd",
+			'&nbsp;<style id="' + id + '" type="text/css">' + css + '</style>'); // fails without &nbsp;
+	} else { // Modern browsers
+		if(el) {
+			el.replaceChild(document.createTextNode(css), el.firstChild);
+		} else {
+			el = document.createElement("style");
+			el.type = "text/css";
+			el.id = id;
+			el.appendChild(document.createTextNode(css));
+			document.getElementsByTagName("head")[0].appendChild(el);
+		}
+	}
+};
+
+})();
diff --git a/core/modules/utils.js b/core/modules/utils.js
index ca9a2de87..f740bbf79 100644
--- a/core/modules/utils.js
+++ b/core/modules/utils.js
@@ -236,69 +236,6 @@ exports.nextTick = function(fn) {
 	}
 };
 
-/*
-Determines whether element 'a' contains element 'b'
-Code thanks to John Resig, http://ejohn.org/blog/comparing-document-position/
-*/
-exports.domContains = function(a,b) {
-	return a.contains ?
-		a != b && a.contains(b) :
-		!!(a.compareDocumentPosition(b) & 16);
-};
-
-exports.hasClass = function(el,className) {
-	return el.className.split(" ").indexOf(className) !== -1;
-};
-
-exports.addClass = function(el,className) {
-	var c = el.className.split(" ");
-	if(c.indexOf(className) === -1) {
-		c.push(className);
-	}
-	el.className = c.join(" ");
-};
-
-exports.removeClass = function(el,className) {
-	var c = el.className.split(" "),
-		p = c.indexOf(className);
-	if(p !== -1) {
-		c.splice(p,1);
-		el.className = c.join(" ");
-	}
-};
-
-exports.toggleClass = function(el,className,status) {
-	if(status === undefined) {
-		status = !exports.hasClass(el,className);
-	}
-	if(status) {
-		exports.addClass(el,className);
-	} else {
-		exports.removeClass(el,className);
-	}
-};
-
-exports.applyStyleSheet = function(id,css) {
-	var el = document.getElementById(id);
-	if(document.createStyleSheet) { // Older versions of IE
-		if(el) {
-			el.parentNode.removeChild(el);
-		}
-		document.getElementsByTagName("head")[0].insertAdjacentHTML("beforeEnd",
-			'&nbsp;<style id="' + id + '" type="text/css">' + css + '</style>'); // fails without &nbsp;
-	} else { // Modern browsers
-		if(el) {
-			el.replaceChild(document.createTextNode(css), el.firstChild);
-		} else {
-			el = document.createElement("style");
-			el.type = "text/css";
-			el.id = id;
-			el.appendChild(document.createTextNode(css));
-			document.getElementsByTagName("head")[0].appendChild(el);
-		}
-	}
-};
-
 /*
 Convert a hyphenated CSS property name into a camel case one
 */