<!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>無標題文檔</title> <style> #div1 {width:200px; height:200px; background:red;} </style> <script> function setStyle(name,value){ var oDiv=document.getElementById('div1'); oDiv.style[name]=value; } </script> </head> <body> <input type="button" value="變寬" onclick="setStyle('width','400px')" /> <input type="button" value="變高" onclick="setStyle('height','400px')" /> <input type="button" value="變綠" onclick="setStyle('background','green')" /> <div id="div1"> </div> </body> </html>