这里演示JavaScript用按钮随意变换背景颜色，每点击一下按钮，就可以随机改变一种网页背景颜色。颜色值事先是保存在JS的数组里，你在代码里会发现他们，若不想要某个颜色，就替换掉即可。
运行效果截图如下：
在线演示地址如下：
具体代码如下：
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312"> <title>通过按钮变换背景颜色</title> </head> <body> <script language="javascript"> var Arraycolor=new Array("olive","teal","red","blue","maroon","navy","lime","fuschia","green","purple","gray","yellow","aqua","white","silver"); var n=0; function turncolors(){ if (n==(Arraycolor.length-1)) n=0; n++; document.bgColor = Arraycolor[n]; } </script> <form method="post" action=""> <p> <input type="button" value="变换背景"> </p> <p>用按钮变换背景颜色.</p> </form> </body> </html>