xsl when statement question

[asiamex]

I am trying to use the below to test the contents of a url and determine values that are contained in it. I believe the below should work but have not had any luck. Shouldn't it return true if "that" is "contained" in the variable "$this" ?

<xsl:when test="contains('$this', 'that')">that is contained in this</xsl:when>

Thanks

 

[jaybytez]

You shouldn't have to put the variable $this in quotes. By putting it in quotes, it is not testing the value of the variable "this", but the string "$this".