js如何查看元素类型

<scripttype="text/javascript">

//定义变量temp

var temp = Object.prototype.toString.apply("abcdef");

alert(temp);

//执行结果------>[Object String]

//定义变量temp

var temp = Object.prototype.toString.apply(123456);

alert(temp );

//执行结果------>[Object int]

<script/>