Keller Information Systems / Web Mostviertel | Web Developer Mostvierte | Search Engine Optimization Dubai

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New customer ERA Austria


we are are glad to welcome ERA Austria as new customer. ERA Austria is highly trusting the professional web services of KELLER information systems.

Flash - XML - HTTPS - load bug in Internet Explorer


Loading XML files in Flash over an SSL Connection in Internet Explorer fails if the Pragma:no-cache or Cache-control:no-cache HTTP headers are set on the XML file.

ERA - Immobilia Obergruber


Since today the new website of ERA Immobilia Obergruber was set online. The site was designet to be emotional and elegant. Real estates are loaded via Soap Requests.

Finally: Datagrid for Mootools 1.2.1


Some days after our datagrid test, we could find the fresh release of Omnigrid, a Flexigrid Clone for Mootools. The best approach so far.

Running multiple Version of Internet Explorer from IE6 - IE7 - IE8


Now its possible to let run Internet Explorer in all major versions at same time without the need to install something. Even you can let run IE6 and IE7 at same time in two different windows.

MIME sniffing in Internet Explorer enables cross-site scripting attacks


Uploading images is a standard requirement in any Web 2.0 application, but some features of Internet Explorer need to be carefully handled.

Website Spam Protection without annoying captcha


We figured out a new way of spam protection for websites. Why annoy your customers with captchas if thers another way.

Carreer Offers


We are still looking for Web Programmers. If you got several years of experience in hardcore programming PHP, JS, Mootools, Jquery, SQL please contact us.

Test of Rich Datagrids for Mootools, Jquery, Extjs


Due the wish of some clients to use over hyped ajax based datagrids we did some research on the web. Which datagrid is the best ?

Hate when your site display is being slow while it waits for google analytics?


Google Analytics is just great. But, regretfully–it often causes a delay in my sites’ display. Loading the script can pause the domready.But there is a simple fix.
22.01.2009 Website Spam Protection without annoying captcha

Lets assume the most spam is done by spambots and not from human filling out forms with pornographical links, so how a spambot will collect email information. We guess there are two ways of how a bot is collecting forms, mailers and email links from various websites.

1. through spidering websites and outgoing links to other websites, while doing so collect relevant information.
2. a person will collect form action urls within forms and add them to a bots database

So the big question is what things need to be done to protect against spam ?

1. protecting real pop accounts from receiving spam
2. ensure that nobody will be able to abuse form action scripts
3. make sure that no robot can abuse forms and send them

The new idea for protection without captcha:

if we assume a bot will enter our site and looking for email adresses to find we should avoid putting real email links into our sites, that can be done by using e.g. mootools to replace any email links with function calls. The second task, the new idea is we let the bot to collect one real email adress our robot@domain.end.

Lets put our robot@domain.end email adress link the very beginning of our website and use an id to connect the link to a stylesheet declaration like that:

<a id="contact" href="mailto:robot@domain.end">robot@domain.end</a>

#contact { display: none; }

Due the css command our Email Link will be completely invisible on the site, so we can be sure if someone finds that email, it must be a "machine", a spambot. If someone sending an email to our robot email adress the conclusion is that we caught a spammer. Collect the IP-adress and put it in some spam database.

Now we will do the same thing with an invisible form:

<form id="contact" action="robot.php"> place some inputs inhere </form>

#contact { display: none; }
Confiure the server side script to store the clients IP adress in our spam database, due anyone who will send the form
is a spammer ( coz the form is invisble ).

The tricky issue

Real search engines should somehow be prevented to find our robot@domain.end mail adress and should not include out robot.php within their spidering process.

If those tasks has been successfully implemented we should have a working system which will track spammers and spambots. Finally if there are more real forms used on a site some additional post filtering should do the rest to sort out
unwanted human spam.

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