下面的JS代码并以了一个movie对象，并给对象定义了一个toString()方法
<script type="text/javascript">
function movie(title, director) {
this.title = title;
this.director = director;
this.toString = function movieToString() {
return("title: "+this.title+" director: "+this.director);
}
}
var narnia = new movie("Narni","Andrew Adamson");
document.write(narnia.toString());
</script>
输出结果如下：
title: Narni director: Andrew Adamson
开心洋葱 , 版权所有丨如未注明 , 均为原创丨未经授权请勿修改 , 转载请注明JavaScript如何使用function定义对象并给对象定义toString()方法！
