toSource() 方法
toSource() 方法返回表示对象源代码的字符串。
function employee(name,job,born)
{
this.name=name;
this.job=job;
this.born=born;
}
var bill=new employee("Bill Gates","Engineer",1985);
document.write(bill.toSource());
输出的是:({name:"Bill Gates", job:"Engineer", born:1985})
toString() 方法
var boo = new Boolean(true)
document.write(boo.toString())
输出的是:true
valueOf() 方法
var boo = new Boolean(false)
document.write(boo.valueOf())
输出的是:false