xsl:if - will this work?

Could anyone tell me if the following code would work? What I want it to do
is take all image tags containing gif images (NOT jpg images) and change
them in the output to <img src="image.gif.wbmp" />

<xsl:template match="img">
	<xsl:if test="@src='*.gif'">
		<img src="{@src}.wbmp" />
	</xsl:if>
</xsl:template>	

Thank you!


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