[Xsltforms-support] xsltforms help with: load/resource/@value single quote escaping

[dom <do...@th...>]

Would very much appreciate any help with the following:

Given a javascript function  myfunc('xxx','yyy','zzz')

and an xforms instance element containing attributes  att1="xxx" 
att2="yyy" att3="zzz"

how do I call this function from the resource child element of a load 
element  ie:

<xf:load>
<xf:resource 
value="concat('javascript:myfunc(''',@att1,''',''',@att2,''',''',@att3,''')')"/>
</xf:load>

which produces the correct result in Saxon but in XSLTForms returns an 
'operator unknown' error
at the position of the first escaped single quote.

Thanks
Dominic Martin