The attribute's value is a comma-separated list of category names. See the HTML 4.0 Recommendation 's section on categorizing cells for an application of AXIS . In addition to the attributes common to most elements , TH takes a number of presentational attributes. Style sheets provide a more flexible way to suggest a presentation for table cells, but TH 's presentational attributes are more widely supported by current browsers. Possible values are left , center , right , justify , and char .
Style sheets provide a safer, more flexible method of specifying a table's background color.
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