webbrowser code clicking a class menu

Hi all

ive had some code working for years, which we use to run a web site pass data to the site and then extract the information we need.

the site has had a update and of course the code no longer works. so im trying to update and rebuild the code but I have a issue trying to select the following areas of html

the link im trying to click is the following

<div class="side_title" id="prj_by_sector_list">
<a href="javascript:void(0)">Browse Projects by Sector</a>
<div class="loadingImg" id="prj_by_sector"></div>
</div>

I have tried the following

WebBrowser1.Document.Window.DomWindow.execscript("prj_by_sector_list")

WebBrowser1.Document.InvokeScript("prj_by_sector_list", New Object())

WebBrowser1.Document.InvokeScript("prj_by_sector_list")

any tips of ideas would be great

many thanks

Will