css 修改table边框的样式，修改单元格间距

我们在调table的边框样式时，经常会出现单元格和表格的样式重叠，而造成某条边框的的异常粗，或者异常细。

修改单元格间距:

cellspacing="0"

修改table标签的样式：

<table border="1" style="width:100%;text-align:center;border:1px solid #ccc;" cellspacing="0">

                <tr>

                    <td colspan="3">合计</td>

                </tr>

                <tr>

                    <td width="33.3%">灾害点</td>

                    <td width="33.3%">户数</td>

                    <td width="33.3%">人数</td>

                </tr>

                <tr>

                    <td>&nbsp;</td>

                    <td></td>

                    <td><