diff --git a/js/js.libraries/src/core/core.kt b/js/js.libraries/src/core/core.kt
index 481d774ff28..da25142f48b 100644
--- a/js/js.libraries/src/core/core.kt
+++ b/js/js.libraries/src/core/core.kt
@@ -21,10 +21,4 @@ fun parseInt(s : String) : Int = js.noImpl
 library
 fun safeParseInt(s : String) : Int? = js.noImpl
 library
-fun safeParseDouble(s : String) : Double? = js.noImpl
-library
-open class Exception() : Throwable() {}
-library
-open class RuntimeException() : Exception() {}
-library
-class NumberFormatException() : Exception() {}
\ No newline at end of file
+fun safeParseDouble(s : String) : Double? = js.noImpl
\ No newline at end of file
diff --git a/js/js.libraries/src/core/javalang.kt b/js/js.libraries/src/core/javalang.kt
index 4e2c2ce288b..fee437eda5a 100644
--- a/js/js.libraries/src/core/javalang.kt
+++ b/js/js.libraries/src/core/javalang.kt
@@ -8,6 +8,9 @@ trait Iterable<T> {
     fun iterator() : java.util.Iterator<T> = js.noImpl
 }
 
+library
+open class Exception() : Throwable() {}
+
 library("splitString")
 public fun String.split(regex : String) : Array<String> = js.noImpl
 
@@ -19,6 +22,9 @@ class IllegalStateException(message: String = "") : Exception() {}
 
 library
 class IndexOutOfBoundsException(message: String = "") : Exception() {}
-
+s
 library
 class UnsupportedOperationException(message: String = "") : Exception() {}
+
+library
+class NumberFormatException(message: String = "") : Exception() {}
diff --git a/js/js.libraries/src/core/javautil.kt b/js/js.libraries/src/core/javautil.kt
index a57259f64d9..50659c3ab67 100644
--- a/js/js.libraries/src/core/javautil.kt
+++ b/js/js.libraries/src/core/javautil.kt
@@ -1,7 +1,6 @@
 package java.util
 
-import js.*;
-
+import java.lang.*
 
 library("collectionsMax")
 public fun max<T>(col : Collection<T>, comp : Comparator<T>) : T = js.noImpl
diff --git a/js/js.translator/src/org/jetbrains/k2js/analyze/AnalyzerFacadeForJS.java b/js/js.translator/src/org/jetbrains/k2js/analyze/AnalyzerFacadeForJS.java
index 22a29692c54..5a39152ab82 100644
--- a/js/js.translator/src/org/jetbrains/k2js/analyze/AnalyzerFacadeForJS.java
+++ b/js/js.translator/src/org/jetbrains/k2js/analyze/AnalyzerFacadeForJS.java
@@ -174,8 +174,9 @@ public final class AnalyzerFacadeForJS {
 
         @Override
         public void addDefaultImports(@NotNull Collection<JetImportDirective> directives) {
-            //TODO: these thing should not be hard-coded like that
+            //TODO: these things should not be hard-coded like that
             directives.add(JetPsiFactory.createImportDirective(project, new ImportPath("js.*")));
+            directives.add(JetPsiFactory.createImportDirective(project, new ImportPath("java.lang.*")));
             directives.add(JetPsiFactory.createImportDirective(project, new ImportPath(JetStandardClasses.STANDARD_CLASSES_FQNAME, true)));
             directives.add(JetPsiFactory.createImportDirective(project, new ImportPath("kotlin.*")));
         }