给三个不同的div变色
<!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=gb2312" /> <title>无标题文档</title> <style> #div1{width:100px;height:100px;background:red;} </style> <script type="text/javascript"> function setColor(color) { var oDiv=document.getElementById("div1"); oDiv.style.background=color; } </script> </head> <body> <input type="button" value="变红" onclick="setColor('red')"/> <input type="button" value="变黄" onclick="setColor(