code: public CrawlElement dontClick(String tagName) {
  		checkNotRead();
  		Preconditions.checkNotNull(tagName, "Tag name cannot be null");
  		CrawlElement crawlTag = new CrawlElement(EventType.click,
  				tagName.toUpperCase());
  		crawlElementsExcluded.add(crawlTag);
  		return crawlTag;
  	}
docs: Set of HTML elements Crawljax will NOT click during crawling When an HTML
  is present in the click and dontClick sets, then the element will not be
  clicked. For example: 1) &lt;a href="#"&gt;Some text&lt;/a&gt; 2) &lt;a
  class="foo" .../&gt; 3) &lt;div class="foo" .../&gt; click("a")
  dontClick("a").withAttribute("class", "foo"); Will include only include
  HTML element 2
  
  @param tagName the tag name of the elements to be excluded
  @return crawlTag the CrawlElement