1 <!DOCTYPE html> 2 <html> 3 <head> 4 <meta charset="utf-8"> 5 <title></title> 6 <script> 7 window.onload=function(){ 8 var hh = document.getElementsByTagName(‘h1‘)[0]; //window.onload为在其他的程序全部执行完以后最后执行，如果不加的话只能让输出在<h1>之后 9 hh.innerHTML = ‘cddd‘; 10 } 11 </script> 12 </head> 13 <body> 14 <h1></h1> 15 </body> 16 </html>
1 <!DOCTYPE html> 2 <html> 3 <head> 4 <meta charset="utf-8"> 5 <title></title> 6 </head> 7 <body> 8 <h1></h1> 9 <script> 10 var hh = document.getElementsByTagName(‘h1‘)[0]; 11 hh.innerHTML = ‘eedd‘; 12 </script> 13 </body> 14 </html>
原文：http://www.cnblogs.com/lsr111/p/4436456.html