apply call出什么错了

Question

<script   language="javascript">
function   ClassA()
{
this.prop="ClassA";
this.methodA=function(msg)
{
alert(this.prop+":"+msg);
}
}
function   ClassB()
{
this.prop="ClassB";
this.methodB=function(msg)
{
alert(this.prop+":"+msg);
}
}
var   obj1=new   ClassA();
var   obj2=new   ClassB();
obj1.methodA("msg1");
obj2.methodB("msg2"); obj1.methodA.apply(obj1,["msg1"]);
obj2.methodB.apply(obj2,["msg2"]);
obj1.methodA.call(obj1,"msg1");
obj2.methodB.call(obj2,"msg2");
</script>
下面多个  }