get Selected Items from qlikdocument displayed using opendoc.htm using Javascript

[#1]

Hi,

I am trying to get the selected items from qlikdocument opened using opendoc.htm from a javascript using the code provided by JuliusHutzler in the link Accessing Selected Items in a Listbox using Javascript

but i get an error "Cannot read property 'QvaPublic' of undefined"

Kindly let me know to access Qva in javascript?

Thank you,

regards,

balaji !