| PASS e.style['z-index'] = "none" should not set the property value | |
| PASS e.style['z-index'] = "10px" should not set the property value | |
| PASS e.style['z-index'] = "0.5" should not set the property value | |
| PASS e.style['z-index'] = "auto 123" should not set the property value | |