<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>无标题文档</title> <style type="text/css"> #div3{ 200px; height:200px; background:#FF0; } </style> <script> function setColor(name,value) { var oDiv=document.getElementById('div3'); oDiv.style[name]=value; } </script> </head> <body> <input type="button" value="变宽" onclick="setColor('width','500px')" /> <input type="button" value="变高" onclick="setColor('height','500px')"/> <input type="button" value="变颜色" onclick="setColor('background','green')"/> <div id="div3"></div> </body> </html>