题目：
用下面给定的方法构造一个对象.
方法有 getFirstName(), getLastName(), getFullName(), setFirstName(first), setLastName(last), and setFullName(firstAndLast).
所有有参数的方法只接受一个字符串参数.
所有的方法只与实体对象交互.
代码：
<script type="text/javascript">
var Person = function(firstAndLast) {
this.getFirstName = function() {
return firstAndLast.split(' ')[0];
};
this.getLastName = function() {
return firstAndLast.split(' ')[1];
};
this.getFullName = function() {
return firstAndLast;
};
this.setFirstName = function(fistName) {
var reg = new RegExp(firstAndLast.split(' ')[0], 'g');
firstAndLast = firstAndLast.replace(reg, fistName);
};
this.setLastName = function(lastName) {
var reg = new RegExp(firstAndLast.split(' ')[1], 'g');
firstAndLast = firstAndLast.replace(reg, lastName);
};
this.setFullName = function(fullName) {
firstAndLast = fullName;
};
};
</script>