table-table-layout和border-collapse: collapse的用法
<html>
<head>
<style type="text/css">
table.one
{
table-layout: automatic
}
table.two
{
table-layout: fixed
}
</style>
</head>
<body>
<table class="one" border="1" width="100%">
<tr>
<td width="20%">1000000000000000000000000000</td>
<td width="40%">10000000</td>
<td width="40%">100</td>
</tr>
</table>
<br />
<table class="two" border="1" width="100%">
<tr>
<td width="20%">1000000000000000000000000000</td>
<td width="40%">10000000</td>
<td width="40%">100</td>
</tr>
</table>
</body>
<head>
<style type="text/css">
table.one
{
table-layout: automatic
}
table.two
{
table-layout: fixed
}
</style>
</head>
<body>
<table class="one" border="1" width="100%">
<tr>
<td width="20%">1000000000000000000000000000</td>
<td width="40%">10000000</td>
<td width="40%">100</td>
</tr>
</table>
<br />
<table class="two" border="1" width="100%">
<tr>
<td width="20%">1000000000000000000000000000</td>
<td width="40%">10000000</td>
<td width="40%">100</td>
</tr>
</table>
</body>
</html>
用table-layout:fixed之后，表格的列宽固定，内容不会挤动列宽，auto则会根据内容变动列宽
table
{
border-collapse:collapse;
}左边是加了border-collapse之后效果，会合并边框