RE: You can use css to help defeat spam harvester botsbots

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RE: You can use css to help defeat spam harvester botsbots

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All Forums >> Web Development >> Cascading Style Sheets >> RE: You can use css to help defeat spam harvester botsbots

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jaybee Posts: 14122 Joined: 10/7/2003 From: Berkshire, UK Status: offline	RE: You can use css to help defeat spam harvester botsbots - 6/16/2006 13:28:14 Try this, it gives you a clickable link but if javascript is turned off you get an email address you can copy and paste. The screen readers pick that up too. _____________________________ If it ain't broke..... fix it until it is. GAWDS Now where did I put that Doctype? (in reply to ou812)


Tailslide Posts: 5972 Joined: 5/10/2005 From: Out here on the raggedy edge Status: offline	RE: You can use css to help defeat spam harvester botsbots - 6/16/2006 13:39:19 That seems pretty neat. I think I'll set it up on a new email addy and leave it for a while to see what happens. I'll let you know if I get any spam. Edit: is it possible to do this without document.write? Can you use document.createElements() ? < Message edited by Tailslide -- 6/16/2006 13:52:23 > _____________________________ "My strategy is so simple an idiot could have devised it" Little Blue Plane Web Design \| Blood, Sweat & Rust - A Land Rover restoration project (in reply to jaybee)

womble

Posts: 5501
Joined: 3/14/2005
From: Living on the edge
Status: offline

RE: You can use css to help defeat spam harvester botsbots - 6/16/2006 20:31:53

You can also use the same sort of thing on contact forms. I've been getting spammed to death on one of my sites and I couldn't work out why - I'd encoded all visible email addresses using hex/ISO (or so I thought), so I couldn't figure out how the nasty little bots had got my address.....I'd completely forgotten until I read your post today that set alarm bells ringing that the contact form I was using had a hidden field:

<input type='hidden' name='rec_mailto' value='name@domain.com' />

Consequence? Those pesky little bots had a field day...

Solution? My hidden field now reads:

<form action="scripts/contactform.php" method="post" id="contactform" enctype="text">
   <fieldset>
	<script language="javascript" type="text/javascript">
	<!--
		var username = "name";
		var hostname = "domain.com";
		var linktext = username + "@" + hostname;
		document.write("<input type='hidden' name='rec_mailto' value='" +username+ "@" + hostname + "' />");
	//-->
	</script> 
	<noscript>
	<p>
	<a title="Copy and Paste the email address to your email editor to send us an email">name<code>@</code>domain.com</a>
	</p>
	</noscript> 
	<input type='hidden' name='rec_subject' value='Contact from the website' />
	<input type='hidden' name='rec_thanks' value='../contactthanks.php' />

etc. etc.

Form has a warning slapped on it that javascript needs to be enabled to use it, and if it isn't, the email address magically appears up at the top of the form.

_____________________________

~~ "A cruel god ain't no god at all" ~~

(in reply to Tailslide)


rdouglass Posts: 9187 From: Biddeford, ME USA Status: offline	RE: You can use css to help defeat spam harvester botsbots - 6/16/2006 23:19:14 For those that have the email magically appear when JS is off; don't most spiders and 'bots run with no JS emulation? IOW, aren't they just automated browsers with no JS? How is that effective? Genuinely interested... _____________________________ Don't take you're eye off your final destination. ASP Checkbox Function Tutorial. (in reply to womble)