<html> <head> <meta charset="utf-8"> <meta name="generator" content="HTML Tidy for HTML5 (experimental) for Windows https://github.com/w3c/tidy-html5/tree/c63cc39" /> <title></title> <style> #div1{ width:100px; height:100px; background:red; } </style> <script> function toYellow(){ var oDiv=document.getElementById(‘div1‘); oDiv.style.background=‘yellow‘; } function toGreen(){ var oDiv=document.getElementById(‘div1‘); oDiv.style.background=‘green‘; } function toBlue(){ var oDiv=document.getElementById(‘div1‘); oDiv.style.background=‘blue‘; } </script> </head> <body> <input type="button" value="变黄" onclick="toYellow()"/> <input type="button" value="变绿" onclick="toGreen()"/> <input type="button" value="变蓝" onclick="toBlue()"/> <div id="div1"></div> </body> </html>
原文：http://www.cnblogs.com/Yimi/p/5924641.html