Add test page for crashing IE8 when the testElement in support has a...

Add test page for crashing IE8 when the testElement in support has a background (will run from the test suite). Supplements #9823.

test/data/support/testElementCrash.html

+<!DOCTYPE html>
+<html lang="en">
+<head>
+	<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+	<style>
+		body {
+			background: url('http://s1.postimage.org/2d2r8xih0/body_background.png');
+		}
+	</style>
+	<script src="../../../src/core.js"></script>
+	<script src="../../../src/deferred.js"></script>
+	<script src="../../../src/support.js"></script>
+</head>
+<body>
+	<script>
+		window.parent.supportCallback();
+	</script>
+</body>
+</html>

test/unit/support.js

@@ -53,3 +53,8 @@ supportIFrameTest( "body background is not lost if set prior to loading jQuery (
 	}
 	ok( passed, "Same support properties" );
 });
+
+supportIFrameTest( "A background on the testElement does not cause IE8 to crash (#9823)", "testElementCrash", function() {
+	expect(1);
+	ok( true, "IE8 does not crash" );
+});