TD and TH Override TR

As the following example illustrates, alignment attributes on TD or TH attributes override those alignments specified by the TR

<table border width="50%">
<TR>                                 
<TD>abc<BR>123</TD>  
<TD>xyz</TD>             
</TR>
<TR ALIGN="center" VALIGN="center">  
<TD>abc<BR>123</TD>  
<TD VALIGN="bottom">xyz</TD>
</TR>
<TR ALIGN="center" VALIGN="center">  
<TD>abc<BR>123</TD>  
<TD VALIGN="top"> xyz </TD>
</TR>
</table>