JS小功能（button选择颜色)简单实例

效果：

代码：
复制代码 代码如下:

   
   
        #red
        {
            width: 260px;
            height: 200px;
            background: #FF0000;
            display: none;
        }
        #green
        {
            width: 260px;
            height: 200px;
            background: #00FF00;
            display: none;
        }
        #yellow
        {
            width: 260px;
            height: 200px;
            background: #FFFF00;
            display: none;
        }
        #blue
        {
            width: 260px;
            height: 200px;
            background: #0000FF;
            display: none;
        }