diff --git a/apisample.htm b/apisample.htm
index 1ee4610b89c565..5e8896f970930b 100644
--- a/apisample.htm
+++ b/apisample.htm
@@ -73,6 +73,36 @@ <h1>Sample HTML5 API Tests</h1>
     }
     test(basicAssertObjectEquals, "basic assert_object_equals test");
 
+    function basicAssertApproxEquals()
+    {
+        assert_approx_equals(10, 11, 1, "10 is approximately (+/- 1) 11")
+    }
+    test(basicAssertApproxEquals, "basic assert_approx_equals test");
+
+    function basicAssertLessThan()
+    {
+        assert_less_than(10, 11, "10 is less than 11")
+    }
+    test(basicAssertApproxEquals, "basic assert_less_than test");
+
+    function basicAssertGreaterThan()
+    {
+        assert_greater_than(10, 11, "10 is not greater than 11");
+    }
+    test(basicAssertGreaterThan, "assert_greater_than expected to fail");
+
+    function basicAssertGreaterThanEqual()
+    {
+        assert_greater_than_equal(10, 10, "10 is greater than or equal to 10")
+    }
+    test(basicAssertGreaterThanEqual, "basic assert_greater_than_equal test");
+
+    function basicAssertLessThanEqual()
+    {
+        assert_greater_than_equal('10', 10, "'10' is not a number")
+    }
+    test(basicAssertLessThanEqual, "assert_less_than_equal expected to fail");
+
     function testAssertInherits() {
         var A = function(){this.a = "a"}
         A.prototype = {b:"b"}
diff --git a/testharness.js b/testharness.js
index 5a2cd2aed5937f..68df8c6231359d 100644
--- a/testharness.js
+++ b/testharness.js
@@ -287,6 +287,18 @@ policies and contribution forms [3].
  * assert_approx_equals(actual, expected, epsilon, description)
  *   asserts that /actual/ is a number within +/- /epsilon/ of /expected/
  *
+ * assert_less_than(actual, expected, description)
+ *   asserts that /actual/ is a number less than /expected/
+ *
+ * assert_greater_than(actual, expected, description)
+ *   asserts that /actual/ is a number greater than /expected/
+ *
+ * assert_less_than_equal(actual, expected, description)
+ *   asserts that /actual/ is a number less than or equal to /expected/
+ *
+ * assert_greater_than_equal(actual, expected, description)
+ *   asserts that /actual/ is a number greater than or equal to /expected/
+ *
  * assert_regexp_match(actual, expected, description)
  *   asserts that /actual/ matches the regexp /expected/
  *
@@ -745,6 +757,74 @@ policies and contribution forms [3].
     };
     expose(assert_approx_equals, "assert_approx_equals");
 
+    function assert_less_than(actual, expected, description)
+    {
+        /*
+         * Test if a primitive number is less than another
+         */
+        assert(typeof actual === "number",
+               "assert_less_than", description,
+               "expected a number but got a ${type_actual}",
+               {type_actual:typeof actual});
+
+        assert(actual < expected,
+               "assert_less_than", description,
+               "expected a number less than ${expected} but got ${actual}",
+               {expected:expected, actual:actual});
+    };
+    expose(assert_less_than, "assert_less_than");
+
+    function assert_greater_than(actual, expected, description)
+    {
+        /*
+         * Test if a primitive number is greater than another
+         */
+        assert(typeof actual === "number",
+               "assert_greater_than", description,
+               "expected a number but got a ${type_actual}",
+               {type_actual:typeof actual});
+
+        assert(actual > expected,
+               "assert_greater_than", description,
+               "expected a number greater than ${expected} but got ${actual}",
+               {expected:expected, actual:actual});
+    };
+    expose(assert_greater_than, "assert_greater_than");
+
+    function assert_less_than_equal(actual, expected, description)
+    {
+        /*
+         * Test if a primitive number is less than or equal to another
+         */
+        assert(typeof actual === "number",
+               "assert_less_than_equal", description,
+               "expected a number but got a ${type_actual}",
+               {type_actual:typeof actual});
+
+        assert(actual <= expected,
+               "assert_less_than", description,
+               "expected a number less than or equal to ${expected} but got ${actual}",
+               {expected:expected, actual:actual});
+    };
+    expose(assert_less_than_equal, "assert_less_than_equal");
+
+    function assert_greater_than_equal(actual, expected, description)
+    {
+        /*
+         * Test if a primitive number is greater than or equal to another
+         */
+        assert(typeof actual === "number",
+               "assert_greater_than_equal", description,
+               "expected a number but got a ${type_actual}",
+               {type_actual:typeof actual});
+
+        assert(actual >= expected,
+               "assert_greater_than_equal", description,
+               "expected a number greater than or equal to ${expected} but got ${actual}",
+               {expected:expected, actual:actual});
+    };
+    expose(assert_greater_than_equal, "assert_greater_than_equal");
+
     function assert_regexp_match(actual, expected, description) {
         /*
          * Test if a string (actual) matches a regexp (expected)