<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> </head> <style> #main{ background-color: red; width:300px; height:400px; } #content{ background-color: pink; width:150px; height:200px; } </style> <body> <script> function t1(){ console.log(name); var name = "alex"; } t1(); // function t1(age){ // console.log(age); // function age() // var age = 27; // console.log(age); // 27 // function age(){} // console.log(age); // 27 // } // // t1(3); </script> </body> </html>
原文：http://www.cnblogs.com/lixiang1013/p/7617397.html