[jQuery] Is it possible to alter internal CSS properties?

[jQuery] Is it possible to alter internal CSS properties?

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<DIV><SPAN class=521272009-01112007><FONT face=Verdana size=2>As we all know, we
can do the following using jQuery:</FONT></SPAN></DIV>
<DIV><SPAN class=521272009-01112007><FONT face=Verdana
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=521272009-01112007><FONT face=Verdana
size=2>$('.someClass').css("background-color: yellow");</FONT></SPAN></DIV>
<DIV><SPAN class=521272009-01112007><FONT face=Verdana
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=521272009-01112007><FONT face=Verdana size=2>This first matches
all elements which have the class someClass, and then alters the css of the
matched elements.</FONT></SPAN></DIV>
<DIV><SPAN class=521272009-01112007><FONT face=Verdana size=2>This won't work
when the class is dynamically added somewhere in the page, for example on a
mouseover.</FONT></SPAN></DIV>
<DIV><SPAN class=521272009-01112007><FONT face=Verdana
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=521272009-01112007><FONT face=Verdana size=2>Is it somehow
possible to really alter the internal style sheet definition, in order to
reflect the wanted changes when a class is dynamically
added?</FONT></SPAN></DIV>
<DIV><SPAN class=521272009-01112007><FONT face=Verdana
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=521272009-01112007><FONT face=Verdana size=2>My guess is that
this is not possible at all, but I'm not sure.. Any ideas?
Thanks!</FONT></SPAN></DIV></BODY></HTML>