让html中的td自动换行

<td   height=80   width=400>

abcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabc

</td>  
如果string很长超过200，那么 <td> 不会自动换行，还是一直的显示，把它旁边的table都撑开了。

如果需要HTML自动按照td的长度换行的话,只需要按照这样子写:

 <td   height=80   width=400style="word-break:break-all">