父页随子页大小而变化
<table width="1002" border="0" align="center" cellpadding="0" cellspacing="0">
<tr>
<td colspan="2"><iframe id="ticket" src="/_5iej/other/company/ticket.asp" height="690" width="100%" frameborder="0" scrolling="no" ></iframe></td>
</tr>
</table>
在子页面中的body中加入
<body onload="parent.document.all.ticket.style.height=document.body.scrollHeight">
