How to get ' to display properly

Hi all,

I am just really tired and I don't know xsl all that well, so I was hoping
that someone could let me know how to format this line:

<a href="javascript:launchApp('" <xsl:value-of select="./ESP/USERNAME"/> ','
<xsl:value-of select="./ESP/APPID"/> ', '<xsl:value-of
select="./ESP/PATH"/>');"class="&linktext;">Click here</a> to link to
ESP.</span>

What I want the rendered text to look like is:

<a href="javascript:launchApp('joeuser','009238','/some/path');"
class="&linktext;">Click here</a> to link to ESP.</span>

I am sure this is something simple, it is giving me an error at the first '
with it being not well formed, but I am new to xsl, and am exceedingly tired
right now, so a helping hand would be really appreciated!

Thanks,
Jon

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