Highlight year change on x-axis values

[JonSnow]

A quick question here.
In a nutshell:How do I highlight a certain value (week) on the x-axis? Can't seem to be able to alter colour or font size in any way.


More detail: I have this chart in Power Point (2007) and on x-axis it displays the week number. It covers last 12 months so this will cross 2 different years What is a good way to highlight a value (the point the year changes) on the x-axis? For example week 1 of the new year would be in red colour.

Thanks

[Andy Pope]

http://www.andypope.info/charts/hiliteaxislabels.htm

same approach can be used in powerpoint

[JonSnow]

Thanks Andy, I expected something simpler for this minor issue, but that'll do the job!