| PASS mozInitMessageEvent on the prototype | |
| PASS mozInitMessageEvent on the instance | |
| PASS msInitMessageEvent on the prototype | |
| PASS msInitMessageEvent on the instance | |
| PASS oInitMessageEvent on the prototype | |
| PASS oInitMessageEvent on the instance | |
| PASS webkitInitMessageEvent on the prototype | |
| PASS webkitInitMessageEvent on the instance | |
| PASS initMessageEvent with no arguments | |