<span style="color:red">它们都可以实现对域的隐藏，但visibility要占用域的空间，而display则不会！下面是一个测试</span><html> <head> <title>标题测试</title> 
<script language="javascript"> 
function testVisibility() 
{ 
document.all("tb_0").style.visibility="hidden"; 
} function testDisplay() { document.all("tb_0").style.display="none"; } function test() { document.all("tb_0").style.visibility="visible"; document.all("tb_1").style.visibility="visible"; document.all("tb_0").style.display="block"; document.all("tb_1").style.display="block"; 
} </script> </head> <body> <form name="form" method="post"> <table id="tb_0"> <tr> <td>内容测试--visible</td> </tr> </table> <table id="tb_1"> <tr> <td>内容测试--hidden</td> </tr> </table> <input type="button" onClick="test();" value="还原"> <input type="button" onClick="testVisibility();" value="测试visibility"> <input type="button" onClick="testDisplay();" value="测试display"> </form> </body> </html> 