interesting? problem

Hi,
Can anyone help me over this problem i had with a stylesheet. suppose i have an xml like this:

<xml>
<path>
<f>
<i>1</i><t>1</t>
</f>
<f>
<i>2</i><t>2</t>
</f>
<f>
<i>3</i><t>3</t>
</f>
</path>
<path>
<f>
<i>1</i><t>2</t>
</f>
<f>
<i>2</i><t>1</t>
</f>
</path>
<path>
<f>
<i>1</i><t>4</t>
</f>
<f>
<i>3</i><t>3</t>
</f>
<f>
<i>4</i><t>2</t>
</f>
</path>
</xml>

what i want to find is a path node that contain i= 1 and t = 1 where i and t is in the same node (i.e. in the
same f node) so the result i want from the above xml is:
<xml>
<path>
<f>
<i>1</i><t>1</t>
</f>
<f>
<i>2</i><t>2</t>
</f>
<f>
<i>3</i><t>3</t>
</f>
</path>
</xml>

i know this will work if i go down to the bottom level and do something like this:
ex. 2
<xsl:template match="xml">
<xsl:for-each select="path">
	<xsl:for-each select ="f[i='1' and t='1']">
	<xsl:copy-of select="../."/>	
	</xsl:for-each>
</xsl:for-each>
</xsl:template>

regards
Kit