[css] word-wrap

<style type="text/css">
table {
	table-layout:fixed;
}

p {
	width: 300px;
	border:1px solid red;
	word-wrap:break-word;
	word-break:break-all;
}
.wordBreak { 
	font-size:0; 
	line-height:0;
}
</style>

<script type="text/javascript">
//<![CDATA[
function wordBreak(element) {
	element.innerHTML = element.innerHTML.split('').join('<span class="wordBreak"> </span>');
}
//wordBreak(document.getElementsByTagName('div')[0]);
wordBreak(document.getElementsByTagName('p')[0]);
//]]>
</script>

<table border="1" width="500px">
	<tr>
		<td width="100px">가나다라</td>
		<td width="300px"><p>
			http://search.naver.com/search.naver?where=nexearch&query=%BC%D2%B3%E0%BD%B4%EB+%C4%AB+%B8%F1%B7%CF&sm=top_hty&fbm=1
			aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
			일이삼사오육칠팔구십일이삼사오육칠팔구십일이삼사오육칠팔구십일이삼사오육칠팔구십일이삼사오육칠팔구십
		</p></td>
		<td width="100px">가나다라</td>
	</tr>
</table>
</body>
</html>