function
test1(name,age)
{
this
.name=name;
this
.age=age;
}
/*定义一个学生类*/
function
test2(name,age,grade)
{
test1.apply(
this
,arguments);
this
.grade=grade;
}
//创建一个学生类
var
test3=
new
test2(
"uw3c"
,24,
"一年级"
);
//测试
alert(
"name:"
+test3.name+
"\n"
+
"age:"
+test3.age+
"\n"
+
"grade:"
+test3.grade);
来源: