在js中,可以使用typeof获取变量或函数的类型,如下:
1 <head runat="server"> 2 <title></title> 3 <script type="text/javascript"> 4 window.onload = function() { 5 var aa = 1; 6 var bb = "123"; 7 alert("aa的类型: " + typeof aa + 8 "\nbb的类型: " + typeof bb + 9 "\ncc的类型: " + typeof cc); 10 11 12 }; 13 14 function cc() { 15 var i = 1; 16 } 17 18 </script> 19 20 </head> 21 <body> 22 <form id="form1" runat="server"> 23 <div> 24 <asp:TextBox runat="server" ID="txt"></asp:TextBox> 25 <div style="z-index: 1000;border:"> 26 <label>hello world</label> 27 </div> 28 </div> 29 </form> 30 </body>
效果图:
原文：http://www.cnblogs.com/hshuai/p/4018242.html
