Fixed some more CSS/visibility tests.

Author: jeresig

test/unit/core.js

@@ -642,11 +642,11 @@ test("css(String|Hash)", function() {
 
 test("css(String, Object)", function() {
 	expect(21);
-	ok( jQuery('#foo').is(':visible'), 'Modifying CSS display: Assert element is visible');
-	jQuery('#foo').css('display', 'none');
-	ok( !jQuery('#foo').is(':visible'), 'Modified CSS display: Assert element is hidden');
-	jQuery('#foo').css('display', 'block');
-	ok( jQuery('#foo').is(':visible'), 'Modified CSS display: Assert element is visible');
+	ok( jQuery('#nothiddendiv').is(':visible'), 'Modifying CSS display: Assert element is visible');
+	jQuery('#nothiddendiv').css("display", 'none');
+	ok( !jQuery('#nothiddendiv').is(':visible'), 'Modified CSS display: Assert element is hidden');
+	jQuery('#nothiddendiv').css("display", 'block');
+	ok( jQuery('#nothiddendiv').is(':visible'), 'Modified CSS display: Assert element is visible');
 
 	jQuery('#floatTest').css('styleFloat', 'left');
 	equals( jQuery('#floatTest').css('styleFloat'), 'left', 'Modified CSS float using "styleFloat": Assert float is left');