Table Header Cell XHTML tag

Table Header Cell Transitional   Strict
th tags example tags example
Must be contained in <table>   As Transitional  
Must contain in opening tag   ----------------------   ----------------------
Must not contain in opening tag name=""
 <table >
<tr>
<th name="bluecell" >&nbsp;</th>
<th >&nbsp;</th>
</tr>
</table>		 As Transitional  
Can contain in opening tag align="" 
[Horizontal align]

align="left"
align="right"
align="center"
align="justify"

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valign=""
[Vertical align]

valign="top"
valign="middle"
valign="baseline"
valign="bottom"

baseline = aligns the cells along the baselines of the text. example

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id=""





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CELL WIDTH - percentage [%]

width="%"






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CELL WIDTH - pixels

width=""

Note: 
you do Not add "px" 
after the amount

e.g [width="500px"]

  		align="left"

<table >
<tr>
<th  align="left">text</th>
<th>&nbsp;</th>
</tr>
</table>
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valign="top"

table >
<tr>
<th valign="top" >text</th>
<th>&nbsp;</th>
</tr>
</table>



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<table >
<tr>
<th id="bluecell" >&nbsp;</th>
<th >&nbsp;</th>
</tr>
</table>
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CELL WIDTH - percentage [%]

<table width="100%">
<tr>
<th width="50%">&nbsp;</th>
<th width="50%">&nbsp;</th>
</tr>
</table>

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CELL WIDTH - pixels

<table width="200">
<tr>
<th width="50">&nbsp;</th>
<th width="50">&nbsp;</th>
</tr>
</table> 		As Transitional







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As Transitional










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As Transitional





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Cell width will
Fail Strict Validation

width="%"






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Cell width will
Fail Strict Validation


























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<table width="100%">
<tr>
<th width="50%">&nbsp;</th>
<th width="50%">&nbsp;</th>
</tr>
</table>

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<table width="200">
<tr>
<th width="50">&nbsp;</th>
<th width="50">&nbsp;</th>
</tr>
</table>
Must contain between tags Text 
or non-breaking space		 <th>Text</th>
<th> &nbsp;</th>		   As Transitional
Can contain between tags        
Must not contain between tags        
Must not be contained in        
Can be contained in        
th is used to define a header row within a table. The <th> element is identical to the <td> element except that the text within the <th> element is usually rendered with a bold font and centered within the cell.