[xsl] or condition

[subbu@xxxxxxxxxxxx]

Hello
I have a faily simple question..
( sadly not for me)
I have to write an 'and-&-or' which has the following condition

<xsl:if test="$b = '10' and ($a = '1' or $a = '2'or $a = '3' or $a = '4')">

this is what i wanted to write..
Is this correct?
and one more question i wanted to ask is that.. is there a way to do some stunt 
like
<xsl:if test="$b = '10' and ($a = ('1' or '2'or '3' or '4'))">
thanks

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