title: Extract email from the webpage in scrapy
body: <p>I want to know what will be the way to extract email address from the page where it is not obvious in the html. e.g. in the page "<a href="http://www.hotfrog.com.au/business/Blacktrac/SendEmail.aspx?company=Blacktrac" rel="nofollow">http://www.hotfrog.com.au/business/Blacktrac/SendEmail.aspx?company=Blacktrac</a>" i want to know what email address the message is sent to when we click "Send Email" button?</p>