XSLT - Adding an IF statement to check XML for colon

I am working on a project with XSLT and XML files.

I need to add logic to the XSLT to check if a colon has been entered into the FTYP_Location, and if it has I need everything BEFORE the colon removed (including the colon). Here is an example of the data that needs to be parsed:

 SAINT MARY FL:@TARGET

Below is the XSLT that I am currently using (the FTYP_LOCATION is the field that will be modified by the IF statement).

<xsl:template match="fieldEvent">
  <MobResMDT>
    <xsl:call-template name="header" />
    <request>
      <FieldEvent>
        <FTYP_TYCOD>
          <xsl:value-of select="type" />
        </FTYP_TYCOD>
        <FTYP_SUBTYCOD>
          <xsl:value-of select="subtype" />
        </FTYP_SUBTYCOD>
        <FTYP_LOCATION>
          <xsl:value-of select="location" />
        </FTYP_LOCATION>
        <FTYP_CMNTS>
          <xsl:value-of select="comments" />
        </FTYP_CMNTS>
        <FTYP_PLATE swtype="swchar">
          <xsl:value-of select="plateNumber" />
        </FTYP_PLATE>
      </FieldEvent>
    </request>
  </MobResMDT>
</xsl:template>

The other thing that could be done, is instead of checking for a colon, we could remove everything before the "@" sign that will be in the code.

I have tried writing the necessary if statement, but have failed numerous times. Any help is greatly appreciated!

Cannot properly hammer down the IF statements (I'm used to working in object-oriented programming, not data fields like XML)