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<!-- 把下面代码加到<body>区域中 --> <style> .style1 {background-color:#CCCCCC;border-left:1px solid #F5F5F5;border-top:1px solid #F5F5F5;border-right:1px solid #333333;border-bottom:1px solid #333333;width:80px;height:20px;} .style2 {background-color:#CCCCCC;border-left:1px solid #000000;border-top:1px solid #000000;border-right:1px solid #F5F5F5;border-bottom:1px solid #F5F5F5;width:80px;height:20px;} </style> <table id=myButton class=style1><tr><td align=center>Button</td></tr></table> <br><br> <button onclick=myButton.className='style1'>弹起</button> <button onclick=myButton.className='style2'>按下</button>
