1.table的属性able-layout：fixed，这会使表格大小不会因为内容变化而变化;
2.当表格table-layout为fixed时，其表格宽度由第一行决定，用colgroup配合col标签设置列宽；
3.td设置样式style="white-space:nowrap; overflow:hidden; text-overflow:ellipsis;"，超出单元格的内容用省略号显示。
<table id="datatable" border="0" style="width: 1280px;table-layout:fixed;"><colgroup ><col width="1"><col width="50"><col width="20"><col width="15"><col width="20"><col width="20"><col width="8"><col width="8"></colgroup><caption>Email List</caption><tbody><tr id="record"><td height="25px"> </td><td style="white-space:nowrap; overflow:hidden; text-overflow:ellipsis;" title="<%=dms.getSubject()%>"><%=dms.getSubject()%></td><td style="white-space:nowrap; overflow:hidden; text-overflow:ellipsis;" title="<%=dms.getSender()%>"> <%=dms.getSender()%></td><td> <%=sentDate%></td><td style="white-space:nowrap; overflow:hidden; text-overflow:ellipsis;" title="<%=dms.getToRecipients()%>"> <%=dms.getToRecipients()%></td><td style="white-space:nowrap; overflow:hidden; text-overflow:ellipsis;" title="<%=dms.getCcRecipients()%>"> <%=dms.getCcRecipients()%></td><td style="text-align: center"> <%=dms.getHasAttachments()%></td><td class="update"><a href="dmsDownload.jsp?id=<%=dms.getId()%>" class="Icon"> Download </a></td></tr></tbody></table>
