diff --git a/js/js.libraries/src/core/javautil.kt b/js/js.libraries/src/core/javautil.kt
index 81cf79bf8bd..166f390544e 100644
--- a/js/js.libraries/src/core/javautil.kt
+++ b/js/js.libraries/src/core/javautil.kt
@@ -16,7 +16,7 @@ public fun comparator<T>(f : (T, T) -> Int) : Comparator<T> = js.noImpl
 
 
 library
-public open class Iterator<T>() {
+public trait Iterator<T> {
     open fun next() : T = js.noImpl
     open fun hasNext() : Boolean = js.noImpl
     open fun remove() : Unit = js.noImpl
@@ -67,6 +67,14 @@ public trait Collection<erased E> : java.lang.Iterable<E> {
     open fun clear() : Unit
 }
 
+library
+public abstract open class AbstractCollection<erased E> : Collection<E> {
+}
+
+library
+public abstract open class AbstractList<erased E> : AbstractCollection<E>, List<E> {
+}
+
 library
 public trait List<erased E> : Collection<E> {
     override fun size() : Int
diff --git a/js/js.translator/testFiles/kotlin_lib.js b/js/js.translator/testFiles/kotlin_lib.js
index 8453ae4410c..e50f1a9b059 100644
--- a/js/js.translator/testFiles/kotlin_lib.js
+++ b/js/js.translator/testFiles/kotlin_lib.js
@@ -286,14 +286,16 @@ var Kotlin;
 
     Kotlin.Exceptions = {};
     Kotlin.Exception = Kotlin.Class.create();
+    Kotlin.RuntimeException = Kotlin.Class.create(Kotlin.Exception);
     Kotlin.Exceptions.IndexOutOfBounds = Kotlin.Class.create(Kotlin.Exception);
     Kotlin.Exceptions.NullPointerException = Kotlin.Class.create(Kotlin.Exception);
+    Kotlin.Exceptions.UnsupportedOperationException = Kotlin.Class.create(Kotlin.Exception);
+    Kotlin.Exceptions.NoSuchElementException = Kotlin.Class.create(Kotlin.Exception);
 
     Kotlin.throwNPE = function() {
         throw new Kotlin.Exceptions.NullPointerException();
     };
 
-
     Kotlin.ArrayList = Class.create({
         initialize:function () {
             this.array = [];
@@ -358,6 +360,50 @@ var Kotlin;
     });
 
 
+    Kotlin.AbstractList = Class.create({
+        set:function (index, value) {
+            throw new Kotlin.Exceptions.UnsupportedOperationException();
+        },
+        iterator:function () {
+            return new Kotlin.ArrayIterator(this);
+        },
+        isEmpty:function () {
+            return (this.size() === 0);
+        },
+        add:function (element) {
+            throw new Kotlin.Exceptions.UnsupportedOperationException();
+        },
+        addAll:function (collection) {
+            var it = collection.iterator();
+            while (it.hasNext()) {
+                this.add(it.next());
+            }
+        },
+        remove:function(value) {
+            for (var i = 0; i < this.$size; ++i) {
+                if (this.array[i] == value) {
+                    this.removeByIndex(i);
+                    return;
+                }
+            }
+        },
+        removeByIndex:function (index) {
+            throw new Kotlin.Exceptions.UnsupportedOperationException();
+        },
+        clear:function () {
+            throw new Kotlin.Exceptions.UnsupportedOperationException();
+        },
+        contains:function (obj) {
+            for (var i = 0; i < this.$size; ++i) {
+                if (Kotlin.equals(this.array[i], obj)) {
+                    return true;
+                }
+            }
+            return false;
+        }
+    });
+
+
     Kotlin.parseInt = function (str) {
         return parseInt(str, 10);
     }
@@ -444,6 +490,7 @@ var Kotlin;
         }
     });
 
+
     Kotlin.RangeIterator = Kotlin.Class.create(Kotlin.Iterator, {
         initialize:function (start, count, reversed) {
             this.$start = start;
diff --git a/libraries/stdlib/src/kotlin/dom/Dom.kt b/libraries/stdlib/src/kotlin/dom/Dom.kt
index 7e2ce26b8ff..62a4cb842aa 100644
--- a/libraries/stdlib/src/kotlin/dom/Dom.kt
+++ b/libraries/stdlib/src/kotlin/dom/Dom.kt
@@ -76,52 +76,8 @@ set(value) {
     this.setAttribute("class", value)
 }
 
-var Element.classSet : Set<String>
-get() {
-    val answer = LinkedHashSet<String>()
-    val array = this.classes.split("""\s""")
-    for (s in array) {
-        if (s != null && s.size > 0) {
-            answer.add(s)
-        }
-    }
-    return answer
-}
-set(value) {
-    this.classes = value.makeString(" ")
-}
-
-
 // Helper methods
 
-/** Returns true if the element has the given CSS class style in its 'class' attribute */
-fun Element.hasClass(cssClass: String): Boolean {
-    val c = this.classes
-    return if (c != null)
-        c.matches("""(^|.*\s+)$cssClass($|\s+.*)""")
-    else false
-}
-
-/** Adds the given CSS class to this element's 'class' attribute */
-fun Element.addClass(cssClass: String): Boolean {
-    val classSet = this.classSet
-    val answer = classSet.add(cssClass)
-    if (answer) {
-        this.classSet = classSet
-    }
-    return answer
-}
-
-/** Removes the given CSS class to this element's 'class' attribute */
-fun Element.removeClass(cssClass: String): Boolean {
-    val classSet = this.classSet
-    val answer = classSet.remove(cssClass)
-    if (answer) {
-        this.classSet = classSet
-    }
-    return answer
-}
-
 /** TODO this approach generates compiler errors...
 
 fun Element.addClass(varargs cssClasses: Array<String>): Boolean {
@@ -153,48 +109,39 @@ fun Element.removeClass(varargs cssClasses: Array<String>): Boolean {
 }
 */
 
-/** Searches for elements using the element name, an element ID (if prefixed with dot) or element class (if prefixed with #) */
-fun Document?.get(selector: String): List<Element> {
-    val root = this?.getDocumentElement()
-    return if (root != null) {
-        if (selector == "*") {
-            elements
-        } else if (selector.startsWith(".")) {
-            elements.filter{ it.hasClass(selector.substring(1)) }.toList()
-        } else if (selector.startsWith("#")) {
-            val id = selector.substring(1)
-            val element = this?.getElementById(id)
-            return if (element != null)
-                Collections.singletonList(element).sure() as List<Element>
-            else
-                Collections.EMPTY_LIST.sure() as List<Element>
+class NodeListAsList(val nodeList: NodeList): AbstractList<Node>() {
+    override fun get(index: Int): Node {
+        val node = nodeList.item(index)
+        if (node == null) {
+            throw IndexOutOfBoundsException("NodeList does not contain a node at index: " + index)
         } else {
-            //  assume its a vanilla element name
-            elements(selector)
+            return node
         }
-    } else {
-        Collections.EMPTY_LIST as List<Element>
     }
+
+    override fun size(): Int = nodeList.getLength()
 }
 
-/** Searches for elements using the element name, an element ID (if prefixed with dot) or element class (if prefixed with #) */
-fun Element.get(selector: String): List<Element> {
-    return if (selector == "*") {
-        elements
-    } else if (selector.startsWith(".")) {
-        elements.filter{ it.hasClass(selector.substring(1)) }.toList()
-    } else if (selector.startsWith("#")) {
-        val element = this.getOwnerDocument()?.getElementById(selector.substring(1))
-        return if (element != null)
-            Collections.singletonList(element).sure() as List<Element>
-        else
-            Collections.EMPTY_LIST.sure() as List<Element>
-    } else {
-        //  assume its a vanilla element name
-        elements(selector)
+class ElementListAsList(val nodeList: NodeList): AbstractList<Element>() {
+    override fun get(index: Int): Element {
+        val node = nodeList.item(index)
+        if (node is Element) {
+            return node
+        } else {
+            if (node == null) {
+                throw IndexOutOfBoundsException("NodeList does not contain a node at index: " + index)
+            } else {
+                throw IllegalArgumentException("Node is not an Element as expected but is $node")
+            }
+        }
     }
+
+    override fun size(): Int = nodeList.getLength()
+
 }
 
+
+
 /** Returns an [[Iterator]] over the next siblings of this node */
 fun Node.nextSiblings() : Iterator<Node> = NextSiblingIterator(this)
 
@@ -229,55 +176,20 @@ class PreviousSiblingIterator(var node: Node) : AbstractIterator<Node>() {
 
 /** Returns true if this node is a Text node or a CDATA node */
 fun Node.isText(): Boolean {
+    /*
+    This code is easier to convert to JS
     val nodeType = getNodeType()
     return nodeType == Node.TEXT_NODE || nodeType == Node.CDATA_SECTION_NODE
+    */
+    return this is Text || this is CDATASection
+
 }
 
-/** Returns an [[Iterator]] of all the next [[Element]] siblings */
-fun Node.nextElements(): Iterator<Element> = nextSiblings().filterIsInstance<Node, Element>(javaClass<Element>())
-
-/** Returns an [[Iterator]] of all the previous [[Element]] siblings */
-fun Node.previousElements(): Iterator<Element> = previousSiblings().filterIsInstance<Node, Element>(javaClass<Element>())
-
 /** Returns the attribute value or empty string if its not present */
 inline fun Element.attribute(name: String): String {
     return this.getAttribute(name) ?: ""
 }
 
-/** Returns the children of the element as a list */
-inline fun Element?.children(): List<Node> {
-    return this?.getChildNodes().toList()
-}
-
-/** The child elements of this document */
-val Document?.elements : List<Element>
-get() = this?.getElementsByTagName("*").toElementList()
-
-/** The child elements of this elements */
-val Element?.elements : List<Element>
-get() = this?.getElementsByTagName("*").toElementList()
-
-
-/** Returns all the child elements given the local element name */
-inline fun Element?.elements(localName: String?): List<Element> {
-    return this?.getElementsByTagName(localName).toElementList()
-}
-
-/** Returns all the elements given the local element name */
-inline fun Document?.elements(localName: String?): List<Element> {
-    return this?.getElementsByTagName(localName).toElementList()
-}
-
-/** Returns all the child elements given the namespace URI and local element name */
-inline fun Element?.elements(namespaceUri: String?, localName: String?): List<Element> {
-    return this?.getElementsByTagNameNS(namespaceUri, localName).toElementList()
-}
-
-/** Returns all the elements given the namespace URI and local element name */
-inline fun Document?.elements(namespaceUri: String?, localName: String?): List<Element> {
-    return this?.getElementsByTagNameNS(namespaceUri, localName).toElementList()
-}
-
 val NodeList?.head : Node?
 get() = if (this != null && this.getLength() > 0) this.item(0) else null
 
diff --git a/libraries/stdlib/src/kotlin/dom/DomJVM.kt b/libraries/stdlib/src/kotlin/dom/DomJVM.kt
index c6e338ee881..a904cefca1a 100644
--- a/libraries/stdlib/src/kotlin/dom/DomJVM.kt
+++ b/libraries/stdlib/src/kotlin/dom/DomJVM.kt
@@ -19,6 +19,135 @@ import javax.xml.transform.stream.StreamResult
 import org.w3c.dom.*
 import org.xml.sax.InputSource
 
+/** Returns the children of the element as a list */
+inline fun Element?.children(): List<Node> {
+    return this?.getChildNodes().toList()
+}
+
+
+/** Returns an [[Iterator]] of all the next [[Element]] siblings */
+fun Node.nextElements(): Iterator<Element> = nextSiblings().filterIsInstance<Node, Element>(javaClass<Element>())
+
+/** Returns an [[Iterator]] of all the previous [[Element]] siblings */
+fun Node.previousElements(): Iterator<Element> = previousSiblings().filterIsInstance<Node, Element>(javaClass<Element>())
+
+
+/** Searches for elements using the element name, an element ID (if prefixed with dot) or element class (if prefixed with #) */
+fun Document?.get(selector: String): List<Element> {
+    val root = this?.getDocumentElement()
+    return if (root != null) {
+        if (selector == "*") {
+            elements
+        } else if (selector.startsWith(".")) {
+            elements.filter{ it.hasClass(selector.substring(1)) }.toList()
+        } else if (selector.startsWith("#")) {
+            val id = selector.substring(1)
+            val element = this?.getElementById(id)
+            return if (element != null)
+                Collections.singletonList(element).sure() as List<Element>
+            else
+                Collections.EMPTY_LIST.sure() as List<Element>
+        } else {
+            //  assume its a vanilla element name
+            elements(selector)
+        }
+    } else {
+        Collections.EMPTY_LIST as List<Element>
+    }
+}
+
+/** Searches for elements using the element name, an element ID (if prefixed with dot) or element class (if prefixed with #) */
+fun Element.get(selector: String): List<Element> {
+    return if (selector == "*") {
+        elements
+    } else if (selector.startsWith(".")) {
+        elements.filter{ it.hasClass(selector.substring(1)) }.toList()
+    } else if (selector.startsWith("#")) {
+        val element = this.getOwnerDocument()?.getElementById(selector.substring(1))
+        return if (element != null)
+            Collections.singletonList(element).sure() as List<Element>
+        else
+            Collections.EMPTY_LIST.sure() as List<Element>
+    } else {
+        //  assume its a vanilla element name
+        elements(selector)
+    }
+}
+
+/** The child elements of this document */
+val Document?.elements : List<Element>
+get() = this?.getElementsByTagName("*").toElementList()
+
+/** The child elements of this elements */
+val Element?.elements : List<Element>
+get() = this?.getElementsByTagName("*").toElementList()
+
+
+/** Returns all the child elements given the local element name */
+inline fun Element?.elements(localName: String?): List<Element> {
+    return this?.getElementsByTagName(localName).toElementList()
+}
+
+/** Returns all the elements given the local element name */
+inline fun Document?.elements(localName: String?): List<Element> {
+    return this?.getElementsByTagName(localName).toElementList()
+}
+
+/** Returns all the child elements given the namespace URI and local element name */
+inline fun Element?.elements(namespaceUri: String?, localName: String?): List<Element> {
+    return this?.getElementsByTagNameNS(namespaceUri, localName).toElementList()
+}
+
+/** Returns all the elements given the namespace URI and local element name */
+inline fun Document?.elements(namespaceUri: String?, localName: String?): List<Element> {
+    return this?.getElementsByTagNameNS(namespaceUri, localName).toElementList()
+}
+
+
+var Element.classSet : Set<String>
+get() {
+    val answer = LinkedHashSet<String>()
+    val array = this.classes.split("""\s""")
+    for (s in array) {
+        if (s != null && s.size > 0) {
+            answer.add(s)
+        }
+    }
+    return answer
+}
+set(value) {
+    this.classes = value.makeString(" ")
+}
+
+/** Returns true if the element has the given CSS class style in its 'class' attribute */
+fun Element.hasClass(cssClass: String): Boolean {
+    val c = this.classes
+    return if (c != null)
+        c.matches("""(^|.*\s+)$cssClass($|\s+.*)""")
+    else false
+}
+
+/** Adds the given CSS class to this element's 'class' attribute */
+fun Element.addClass(cssClass: String): Boolean {
+    val classSet = this.classSet
+    val answer = classSet.add(cssClass)
+    if (answer) {
+        this.classSet = classSet
+    }
+    return answer
+}
+
+/** Removes the given CSS class to this element's 'class' attribute */
+fun Element.removeClass(cssClass: String): Boolean {
+    val classSet = this.classSet
+    val answer = classSet.remove(cssClass)
+    if (answer) {
+        this.classSet = classSet
+    }
+    return answer
+}
+
+
 /** Converts the node list to an XML String */
 fun NodeList?.toXmlString(xmlDeclaration: Boolean = false): String {
     return if (this == null)
@@ -45,37 +174,6 @@ inline fun NodeList?.toElementList(): List<Element> {
     }
 }
 
-class NodeListAsList(val nodeList: NodeList): AbstractList<Node>() {
-    override fun get(index: Int): Node {
-        val node = nodeList.item(index)
-        if (node == null) {
-            throw IndexOutOfBoundsException("NodeList does not contain a node at index: " + index)
-        } else {
-            return node
-        }
-    }
-
-    override fun size(): Int = nodeList.getLength()
-}
-
-class ElementListAsList(val nodeList: NodeList): AbstractList<Element>() {
-    override fun get(index: Int): Element {
-        val node = nodeList.item(index)
-        if (node is Element) {
-            return node
-        } else {
-            if (node == null) {
-                throw IndexOutOfBoundsException("NodeList does not contain a node at index: " + index)
-            } else {
-                throw IllegalArgumentException("Node is not an Element as expected but is $node")
-            }
-        }
-    }
-
-    override fun size(): Int = nodeList.getLength()
-
-}
-
 /** Creates a new document with the given document builder*/
 public fun createDocument(builder: DocumentBuilder): Document {
     return builder.newDocument().sure()