diff --git a/js/js.libraries/src/core/javalang.kt b/js/js.libraries/src/core/javalang.kt
index 4f35357e6f4..c27193b5412 100644
--- a/js/js.libraries/src/core/javalang.kt
+++ b/js/js.libraries/src/core/javalang.kt
@@ -35,10 +35,12 @@ public trait Runnable {
     public open fun run() : Unit;
 }
 
+library
 public trait Comparable<T> {
     public fun compareTo(that: T): Int
 }
 
+library
 public trait Appendable {
     public open fun append(csq: CharSequence?): Appendable?
     public open fun append(csq: CharSequence?, start: Int, end: Int): Appendable?
diff --git a/js/js.libraries/src/core/javautil.kt b/js/js.libraries/src/core/javautil.kt
index 3323285902d..00210dd79ab 100644
--- a/js/js.libraries/src/core/javautil.kt
+++ b/js/js.libraries/src/core/javautil.kt
@@ -17,48 +17,12 @@ public trait Iterator<T> {
     open public fun remove() : Unit = js.noImpl
 }
 
-public object Collections {
-    library("collectionsMax")
-    public fun max<T>(col : Collection<T>, comp : Comparator<T>) : T = js.noImpl
-
-    // TODO should be immutable!
-    public val emptyList: List<Any> = ArrayList<Any>()
-    public val emptyMap: Map<Any, Any> = HashMap<Any,Any>()
-
-    public val <T> EMPTY_LIST: List<T>
-    get() = emptyList<T>()
-
-    public val <K,V> EMPTY_MAP: Map<K,V>
-    get() = emptyMap<K,V>()
-
-    public fun <T> emptyList(): List<T> = emptyList as List<T>
-    public fun <K,V> emptyMap(): Map<K,V> = emptyMap as Map<K,V>
-
-    public fun <in T> sort(list: List<T>): Unit {
-        throw UnsupportedOperationException()
-    }
-
-    public fun <in T> sort(list: List<T>, comparator: java.util.Comparator<T>): Unit {
-        throw UnsupportedOperationException()
-    }
-
-    public fun <T> reverse(list: List<T>): Unit {
-        val size = list.size()
-        for (i in 0.upto(size / 2)) {
-            val i2 = size - i
-            val tmp = list[i]
-            list[i] = list[i2]
-            list[i2] = tmp
-        }
-    }
-}
-
 library
 public trait Collection<E>: Iterable<E> {
     open public fun size(): Int
     open public fun isEmpty(): Boolean
     open public fun contains(o: Any?): Boolean
-    override public fun iterator(): Iterator<E>
+    override public fun iterator(): java.util.Iterator<E>
     public fun toArray(): Array<E>
     // open public fun toArray<T>(a : Array<out T>) : Array<T>
     open public fun add(e: E): Boolean
@@ -76,7 +40,7 @@ public abstract class AbstractCollection<E>() : Collection<E> {
 
     override public fun isEmpty(): Boolean = js.noImpl
     override public fun contains(o: Any?): Boolean = js.noImpl
-    override public fun iterator(): Iterator<E> = js.noImpl
+    override public fun iterator(): java.util.Iterator<E> = js.noImpl
 
     override public fun add(e: E): Boolean = js.noImpl
     override public fun remove(o: Any?): Boolean = js.noImpl
diff --git a/js/js.libraries/src/core/javautilCode.kt b/js/js.libraries/src/core/javautilCode.kt
new file mode 100644
index 00000000000..e8ae545c521
--- /dev/null
+++ b/js/js.libraries/src/core/javautilCode.kt
@@ -0,0 +1,39 @@
+package java.util
+
+import java.lang.*
+
+public object Collections {
+    library("collectionsMax")
+    public fun max<T>(col : Collection<T>, comp : Comparator<T>) : T = js.noImpl
+
+    // TODO should be immutable!
+    public val emptyList: List<Any> = ArrayList<Any>()
+    public val emptyMap: Map<Any, Any> = HashMap<Any,Any>()
+
+    public val <T> EMPTY_LIST: List<T>
+    get() = emptyList<T>()
+
+    public val <K,V> EMPTY_MAP: Map<K,V>
+    get() = emptyMap<K,V>()
+
+    public fun <T> emptyList(): List<T> = emptyList as List<T>
+    public fun <K,V> emptyMap(): Map<K,V> = emptyMap as Map<K,V>
+
+    public fun <in T> sort(list: List<T>): Unit {
+        throw UnsupportedOperationException()
+    }
+
+    public fun <in T> sort(list: List<T>, comparator: java.util.Comparator<T>): Unit {
+        throw UnsupportedOperationException()
+    }
+
+    public fun <T> reverse(list: List<T>): Unit {
+        val size = list.size()
+        for (i in 0.upto(size / 2)) {
+            val i2 = size - i
+            val tmp = list[i]
+            list[i] = list[i2]
+            list[i2] = tmp
+        }
+    }
+}
diff --git a/js/js.libraries/src/core/stringDefs.kt b/js/js.libraries/src/core/string.kt
similarity index 98%
rename from js/js.libraries/src/core/stringDefs.kt
rename to js/js.libraries/src/core/string.kt
index 0cd5c9a2751..e96ed924991 100644
--- a/js/js.libraries/src/core/stringDefs.kt
+++ b/js/js.libraries/src/core/string.kt
@@ -12,7 +12,8 @@ native public fun String.indexOf(str : String, fromIndex : Int) : Int = js.noImp
 native public fun String.lastIndexOf(str: String) : Int = js.noImpl
 native public fun String.lastIndexOf(str : String, fromIndex : Int) : Int = js.noImpl
 
-native public fun String.split(regex : String) : Array<String> = js.noImpl
+// Defined in javalang.kt
+//native public fun String.split(regex : String) : Array<String> = js.noImpl
 
 native public fun String.substring(beginIndex : Int) : String = js.noImpl
 native public fun String.substring(beginIndex : Int, endIndex : Int) : String = js.noImpl
diff --git a/js/js.libraries/src/core/strings.kt b/js/js.libraries/src/core/stringsCode.kt
similarity index 100%
rename from js/js.libraries/src/core/strings.kt
rename to js/js.libraries/src/core/stringsCode.kt
diff --git a/js/js.libraries/src/stdlib/JUMaps.kt b/js/js.libraries/src/stdlib/JUMapsCode.kt
similarity index 100%
rename from js/js.libraries/src/stdlib/JUMaps.kt
rename to js/js.libraries/src/stdlib/JUMapsCode.kt
diff --git a/js/js.libraries/src/stdlib/dom.kt b/js/js.libraries/src/stdlib/domCode.kt
similarity index 100%
rename from js/js.libraries/src/stdlib/dom.kt
rename to js/js.libraries/src/stdlib/domCode.kt
diff --git a/js/js.libraries/src/stdlib/jutil.kt b/js/js.libraries/src/stdlib/jutilCode.kt
similarity index 100%
rename from js/js.libraries/src/stdlib/jutil.kt
rename to js/js.libraries/src/stdlib/jutilCode.kt
diff --git a/js/js.libraries/src/stdlib/test.kt b/js/js.libraries/src/stdlib/testCode.kt
similarity index 100%
rename from js/js.libraries/src/stdlib/test.kt
rename to js/js.libraries/src/stdlib/testCode.kt
diff --git a/js/js.translator/src/org/jetbrains/k2js/config/Config.java b/js/js.translator/src/org/jetbrains/k2js/config/Config.java
index c79538bbdad..966c9551de0 100644
--- a/js/js.translator/src/org/jetbrains/k2js/config/Config.java
+++ b/js/js.translator/src/org/jetbrains/k2js/config/Config.java
@@ -56,28 +56,31 @@ public abstract class Config {
     @NotNull
     public static final List<String> LIB_FILES_WITH_DECLARATIONS = Arrays.asList(
             "/core/annotations.kt",
-            "/jquery/common.kt",
-            "/jquery/ui.kt",
-            "/core/javautil.kt",
-            "/core/javalang.kt",
-            "/core/javaio.kt",
-            "/core/kotlin.kt",
-            "/core/date.kt",
             "/core/core.kt",
-            "/core/math.kt",
-            "/core/json.kt",
-            "/stdlib/browser.kt",
+            "/core/date.kt",
             "/core/dom.kt",
+            "/core/javaio.kt",
+            "/core/javalang.kt",
+            "/core/javautil.kt",
+            "/core/json.kt",
+            "/core/kotlin.kt",
+            "/core/math.kt",
+            "/core/string.kt",
             "/dom/domcore.kt",
             "/dom/html/htmlcore.kt",
             "/dom/html5/canvas.kt",
             "/dom/html/window.kt",
+            "/jquery/common.kt",
+            "/jquery/ui.kt",
             "/junit/core.kt",
-            "/qunit/core.kt"
+            "/qunit/core.kt",
+            "/stdlib/browser.kt"
     );
 
     @NotNull
-    public static final List<String> LIB_FILES_WITH_CODE = Lists.newArrayList();
+    public static final List<String> LIB_FILES_WITH_CODE = Arrays.asList(
+            "/core/javautilCode.kt"
+    );
 
     @NotNull
     public static final List<String> LIB_FILE_NAMES = Lists.newArrayList();
@@ -91,12 +94,11 @@ public abstract class Config {
      */
     @NotNull
     public static final List<String> LIB_FILE_NAMES_DEPENDENT_ON_STDLIB = Arrays.asList(
-            "/stdlib/dom.kt",
-            "/stdlib/jutil.kt",
-            //"/stdlib/JUMaps.kt",
-            "/stdlib/test.kt",
-            "/core/stringDefs.kt",
-            "/core/strings.kt"
+            "/core/stringsCode.kt",
+            "/stdlib/domCode.kt",
+            "/stdlib/jutilCode.kt",
+            //"/stdlib/JUMapsCode.kt",
+            "/stdlib/testCode.kt"
     );
 
     public static final String LIBRARIES_LOCATION = "js/js.libraries/src";
diff --git a/js/js.translator/testFiles/kotlin_lib.js b/js/js.translator/testFiles/kotlin_lib.js
index 2722a7e4201..eb4954fa902 100644
--- a/js/js.translator/testFiles/kotlin_lib.js
+++ b/js/js.translator/testFiles/kotlin_lib.js
@@ -161,6 +161,24 @@ var kotlin = {set:function (receiver, key, value) {
         }
     });
 
+    Kotlin.Runnable = Kotlin.$createClass({
+        initialize: function () {
+        },
+        run: throwAbstractFunctionInvocationError
+    });
+
+    Kotlin.Comparable = Kotlin.$createClass({
+        initialize: function () {
+        },
+        compareTo: throwAbstractFunctionInvocationError
+    });
+
+    Kotlin.Appendable = Kotlin.$createClass({
+        initialize: function () {
+        },
+        append: throwAbstractFunctionInvocationError
+    });
+
     Kotlin.parseInt = function (str) {
         return parseInt(str, 10);
     };
diff --git a/libraries/tools/kotlin-js-library/pom.xml b/libraries/tools/kotlin-js-library/pom.xml
index d4bf68bd910..f95559a88ea 100644
--- a/libraries/tools/kotlin-js-library/pom.xml
+++ b/libraries/tools/kotlin-js-library/pom.xml
@@ -31,25 +31,20 @@
                                 <mkdir dir="${basedir}/target/generated-js-definitions"/>
                                 <copy todir="${basedir}/target/generated-js-definitions">
                                     <fileset dir="${kotlin-js-lib-srcdir}">
+                                        <exclude name="**/*Code.kt"/>
                                         <exclude name="core/dom/core.kt"/>
-                                        <exclude name="core/strings.kt"/>
                                         <exclude name="html5/localstorage.kt"/>
                                         <exclude name="jquery/common.kt"/>
                                         <exclude name="jquery/ui.kt"/>
                                         <exclude name="dom/html/htmlcore.kt"/>
                                         <exclude name="dom/html5/canvas.kt"/>
                                         <exclude name="dom/html/window.kt"/>
-                                        <exclude name="stdlib/test.kt"/>
-                                        <exclude name="stdlib/dom.kt"/>
-                                        <exclude name="stdlib/jutil.kt"/>
                                     </fileset>
                                 </copy>
                                 <copy todir="${basedir}/target/generated-js-library">
                                     <fileset dir="${kotlin-js-lib-srcdir}">
-                                        <include name="stdlib/test.kt"/>
-                                        <include name="stdlib/jutil.kt"/>
-                                        <include name="stdlib/dom.kt"/>
-                                        <include name="core/strings.kt"/>
+                                        <include name="**/*Code.kt"/>
+                                        <exclude name="**/JUtilMapsCode.kt"/>
                                     </fileset>
                                 </copy>
                                 <copy todir="${basedir}/target/generated-js-library/kotlin">
@@ -70,16 +65,22 @@
                                         <include name="Iterators.kt"/>
                                         <include name="JUtil.kt"/>
                                         <include name="JUtilCollections.kt"/>
+<!--
                                         <include name="JUtilMaps.kt"/>
+-->
                                         <include name="JLangIterables.kt"/>
                                         <include name="JLangIterablesLazy.kt"/>
-                                        <include name="JLangIterablesSpecial.kt"/>
+                                        <include name="JLangIterablesSpecial.kkt"/>
 <!--
                                         <include name="Ordering.kt"/>
 -->
                                         <include name="Standard.kt"/>
                                         <include name="Strings.kt"/>
                                     </fileset>
+                                    <fileset dir="${basedir}/../../stdlib/src/generated">
+                                        <include name="JUtilIteratorsFromJLangIterables.kt"/>
+                                        <include name="JUtilIterablesFromJUtilCollections.kt"/>
+                                    </fileset>
                                 </copy>
                                 <copy tofile="${basedir}/target/generated-js-library/kotlin-lib.js"
                                       file="${kotlin-js-lib-srcdir}/../../js.translator/testFiles/kotlin_lib.js"/>