am trying to click an <a> link that dosen't have href

for example
html Code:
  1. <a class="classname">
  2.     <div class="classname2"></div>
  3.     <span class="span">spantext</span>
  4. </a>

how do i do this, this dosen't work?
vb Code:
  1. webbrowser.Document.All("classname").Click