I am trying to pass reference to a pdf file to HTML object. If the file name is hard coded it works as in

    <object class="pdf" 
                data="docs/DQ704.pdf"
                width="800"
                height="900">
    </object>

but when I pass a php variable to data as follows I get an index of the /docs folder

    <object class="pdf" 
                data="/docs/"<?php  echo $brochure_name;?>
                width="800"
                height="900">
    </object>

What should I do to make this work please.