下边的代码如下，大家copy过去存为htm，img不管它
用ie或firefox打开
会发现asdfasdf上边的那条线比下边的那条线要白一些
可是我的代码是这么写的：
上边的那条线：
25行：
<TD colspan= "3 " align= "center " style= "border-bottom-color:gray;border-bottom-width:1px ">
下边的那条线：
45行：
<TD colspan= "3 " height= "1px " style= "border-top-color:white;border-top-width:1px ">
white居然比gray还黑？
这是啥问题？
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN ">
<html>
<head>
<meta http-equiv= "Content-Type " content= "text/html; charset=gb2312 ">
<style type= "text/css ">
<!--
.text {font-size: 12px;width:100%;height:19px;
background-color:white;background-Image:url(image/textbg.gif)}
body { text-align: center;font-size:12px;background-image:url(image/graybg.gif);margin:0;}
td{border-width:0px}
-->
</style>
</head>
<body>
<TABLE width= "869px " style= "background-color:black " border= "1 ">
<tr>
<TD rowspan= "4 " style= "border-right-color:gray;border-right-width:1px ">
<IMG SRC= "image/logo.gif ">
</TD>
<td colspan= "3 ">
</td>
</tr>
<TR>
<TD colspan= "3 " align= "center " style= "border-bottom-color:gray;border-bottom-width:1px ">
<IMG SRC= "image/home.gif ">
<IMG SRC= "image/sperate.gif ">
<IMG SRC= "image/customer.gif ">
<IMG SRC= "image/sperate.gif ">
<IMG SRC= "image/service.gif ">
<IMG SRC= "image/sperate.gif ">
<IMG SRC= "image/tech.gif ">
<IMG SRC= "image/sperate.gif ">
<IMG SRC= "image/view.gif ">
<IMG SRC= "image/sperate.gif ">
<IMG SRC= "image/contact.gif ">
</TD>
</TR>
<TR>
<TD width= "200px " align= "right "> <IMG SRC= "image/bgimage.GIF "> <IMG SRC= "image/left.gif "> </td>
<td width= "469px "> <div class= "text "> asdfasdf </div> </td>
<TD width= "200px "> <IMG SRC= "image/right.gif "> <IMG SRC= "image/bgimageright.gif "> </TD>
</TR>
<TR>
<TD colspan= "3 " height= "1px " style= "border-top-color:white;border-top-width:1px ">
</TD>
</TR>
<td colspan= "4 ">
<IMG SRC= "image/blank.gif ">
</td>
</TABLE>
<body>
</html>
------解决方案--------------------
设置下边框，不要设上边框的，设上边框会把上面的TR的下边框也带出来，并且还是黑色，所以两个混合了就比较黑了，也不知道浏览器为什么这么搞？
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN ">
<html>