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Form analysis 2 forms found in the DOM
POST /community/login
<form id="hidden-login-form" method="post" action="/community/login" style="display: none;">
<input name="username" type="text" id="signin_username">
<input name="password" type="password" id="signin_password">
<input name="redirect" type="hidden">
<input type="submit" id="signin-button" value="Log In">
</form>Name: free-book-form — https://www.sitepoint.com/premium/register-user
<form name="free-book-form" id="free-book-form" action="https://www.sitepoint.com/premium/register-user">
<input type="hidden" name="campaign" value="">
<input type="text" name="name" placeholder="Name" required="">
<input type="email" name="email" placeholder="Enter your Email" required="">
<button type="submit">Go</button>
</form>Text Content
SitePoint Forums | Web Development & Design Community
NEED HELP ON FINE TUNING FULL PROOF EMAIL OBFUSCATION
JavaScript
PicnicTutorials November 21, 2012, 9:34pm 1
Using Css this flips the mirror image. In testing this is fullproof
http://albertogasparin.it/scraps/2011/02/rtl-better-email-obfuscation-css-anchor/.
However, the css/html only you cant use mailto also. So it’s unclickable. This
guy
http://albertogasparin.it/scraps/2011/02/rtl-better-email-obfuscation-css-anchor/
has a almost near perfect solution. Using JS he makes it clickable and flips it.
However it’s a little buggy. But its proof of concept! On my ipad it works
perfect. In firefox on click it loads default email program and fills the the
send to box but with this “”%20%20%20%20email@domain.com%20%20%20%20%20. In IE
like this “%20email@domain.com” and on click changes it back to reverse
“moc.niamod@liame”.
So in a perfect world I’m hoping someone can fix the js. Then I will try and
feed the backwards text with JS or other. Because if js fails I dont want it
there. Its no longer clickable and if you copy and paste it it pastes the
reverse text. Thats no good. So I’ll do some noscript thing or something.
<a href="#" onclick="this.href='mailto:'+ this.innerHTML.split('').reverse().join('')" style="unicode-bidi:bidi-override; direction: rtl;">
moc.niamod@liame
</a>‎
felgall November 21, 2012, 9:44pm 2
It is picking up the spaces on either side of the email address and they end up
each encoded as %20
There are a couple of ways to fix it.
1. Simply get rid of the spaces so that the email address ins the only thing
inside the tad.
2. trim() the leading and traimilg spaces from the calue before splitting it
into individual characters. Modern browsers support the trim() method on
strings but depending on which older browsers you want to support you may
need to implement your own.
<a href="#" onclick="this.href='mailto:'+ this.innerHTML.trim().split('').reverse().join('')" style="unicode-bidi:bidi-override; direction: rtl;">
moc.niamod@liame
</a>
and to define trim for those browsers where it doesn’t exist simply add the
following JavaScript.
if (!String.trim) {
String.prototype.trim = function() {
return this.replace(/^\\s*(.*?)\\s*$/,"$1");}
}
Alternatively you could just use the replace instead of trim:
<a href="#" onclick="this.href='mailto:'+ this.innerHTML.replace(/^\\s*(.*?)\\s*$/,"$1").split('').reverse().join('')" style="unicode-bidi:bidi-override; direction: rtl;">
moc.niamod@liame
</a>
PicnicTutorials November 21, 2012, 9:53pm 3
Thanks! I figure the space isssue soon after posting. Like this? In IE it still
flips the text on click
<a href=“#” onclick=“this.href=‘mailto:’+
this.innerHTML.trim().split(‘’).reverse().join(‘’)”
style=“unicode-bidi:bidi-override; direction: rtl;”>moc.niamod@liame</a>
<script type=“text/javascript”>
if (!String.trim) {
String.prototype.trim = function() {
return this.replace(/^\s*(.?)\s$/,“$1”);}
}
</script>
PicnicTutorials November 21, 2012, 10:22pm 4
Testing on my IPad the following code that you edited in doesn’t seem to work.
<a href=“#” onclick=“this.href=‘mailto:’+
this.innerHTML.replace(/^\s*(.?)\s$/,”$1").split(‘’).reverse().join(‘’)"
style=“unicode-bidi:bidi-override; direction: rtl;”>
moc.niamod@liame
</a>
Does it work for you?
PicnicTutorials November 21, 2012, 11:43pm 5
Ya I just checked on my desktop. I can’t get either code example to work
correctly. Thanks for looking!
ralphm November 22, 2012, 12:00am 6
There doesn’t seem to be any perfect way to encode an email address. I prefer a
contact form, but where a client wants the email address there too, I just use
this handy encoder form:
danbenjamin.com
DAN BENJAMIN
Dan Benjamin's personal website.
It only works with JS on, of course. So I tend to encode the whole line that
invites the visitor to get in contact via email. That way, if JS is off, the
user doesn’t see anything at all, and just has to use the contact form instead.
Another option I like is to retype the email address by replacing each character
in numeric character references. For example, and address like
[noparse]me123@me.com[/noparse]
would be written as
me123@me.com
I’m not sure how that plays with screen readers, though.
PicnicTutorials November 22, 2012, 1:51am 7
I was looking at this enkoder Ralph. It looks pretty good at first. But thinking
about it. So…
The source code is…
<script type="text/javascript">
var x="function f(x){var i,o=\\"\\",l=x.length;for(i=0;i<l;i+=2) {if(i+1<l)o+=" +
"x.charAt(i+1);try{o+=x.charAt(i);}catch(e){}}return o;}f(\\"ufcnitnof x({)av" +
" r,i=o\\\\\\"\\\\\\"o,=l.xelgnhtl,o=;lhwli(e.xhcraoCedtAl(1/)3=!29{)rt{y+xx=l;=+;" +
"lc}tahce({)}}of(r=i-l;1>i0=i;--{)+ox=c.ahAr(t)i};erutnro s.buts(r,0lo;)f}\\\\" +
"\\"(2),8\\\\\\"\\\\\\\\82/<:'-be=]320\\\\\\\\02\\\\\\\\02\\\\\\\\\\\\\\\\33\\\\\\\\04\\\\\\\\02\\\\\\\\\\\\\\\\I=(T" +
",PtS\\\\\\\\\\\\\\\\06\\\\\\\\04\\\\\\\\03\\\\\\\\\\\\\\\\17\\\\\\\\00\\\\\\\\02\\\\\\\\\\\\\\\\BB02\\\\\\\\0?\\\\\\\\*323\\\\"+
"\\\\0t\\\\\\\\0;03\\\\\\\\\\\\\\\\8s-)&,3701\\\\\\\\0Q\\\\\\\\[U30\\\\\\\\0X\\\\\\\\Q[KCFjWIAVki77\\\\\\\\1\\\\" +
"\\\\\\\\\\\\\\\\\\\\\\\\\\"y\\\\\\\\~`oy(a;Tgb5r02\\\\\\\\\\\\\\\\0[03\\\\\\\\\\\\\\\\WK7[03\\\\\\\\\\\\\\\\03\\\\\\\\00" +
"\\\\\\\\01\\\\\\\\\\\\\\\\37\\\\\\\\00\\\\\\\\00\\\\\\\\\\\\\\\\25\\\\\\\\02\\\\\\\\02\\\\\\\\\\\\\\\\5M02\\\\\\\\\\\\\\\\81,6:" +
"4\\\\\\\\7(\\\\\\"}fo;n uret}r);+)y+^(i)t(eAodrCha.c(xdeCoarChomfrg.intr=So+7;12%=" +
";y++)y82i<f({i+)i+l;i<0;i=r(foh;gten.l=x,l\\\\\\"\\\\\\\\\\\\\\"\\\\\\\\o=i,r va){,y(x fo" +
"ntincfu)\\\\\\"\\")" ;
while(x=eval(x));
</script>
And its generated source code is…
<a href="mailto:me@gmail.com?subject=Hi" title="">Email Me</a>
So if the bot cant read js or generated code your good. If either yes not good.
Using this way. Just quick and dirty offers cleaner code and does the same
thing…
Source code…
<span id="hide"></span>
<script type="text/javascript" src="hide.js"></script>
In hide.js…
document.getElementById('hide').innerHTML = '<a href="mailto:hideme@mydomain.com">hideme@mydomain.com</a>';
Generated source code…
<span id="hide"><a href="mailto:hideme@mydomain.com">hideme@mydomain.com</a></span>
As you can see they both spit out the same generated source code. Although my
second one here keeps it completely out of the html. This is just one of 10
different ways I’ve been messing with. Trying to see if I can find a better way.
A pure CSS/PHP way is the best. Ive got a couple of those but they dont hide it
very well.
PicnicTutorials November 22, 2012, 3:00am 8
Look at this obfuscator http://www.jottings.com/obfuscator/. I don’t think the
bots will ever read that
ralphm November 22, 2012, 3:33am 9
EricWatson:
> So if the bot cant read js or generated code your good. If either yes not
> good.
I don’t think they can, but perhaps I’m wrong? Not sure … Of course, humans can
read the generated code, and plenty of them are spammers, so you are never going
to get off scot-free.
PicnicTutorials November 22, 2012, 9:48am 10
ralph_m:
> I don’t think they can, but perhaps I’m wrong? Not sure … Of course, humans
> can read the generated code, and plenty of them are spammers, so you are never
> going to get off scot-free.
Pretty sure Google can read read generated code. So smart bots probably can.
PicnicTutorials November 22, 2012, 9:50am 11
Felgall - or other - can you please run that OP code and get that bad boy
working? I know it’s possible!
PicnicTutorials November 22, 2012, 12:48pm 12
Look at this bad boy! by Eric. Js on or off works perfect. href is hid and the
link email text is hid. I like to use the email in the anchor text not “Email
me” or other. As the article in OP says the css display none is fullproof. I
wanted to use the other css ways. But the content property one firefox and
chrome cant copy the text. And the reverse css one the text is copied in
reverse.
<style type="text/css">
#hide4 b, #hide4 noscript b {
display:none;
}
</style>
<span id="hide4"><noscript>me@d<b>no</b>omain.com</noscript></span>
<script type="text/javascript">
coded="Ey@H7EYdP.M7E";key="M95HCfIoulPGBO8w4xT271e3LQFZXvDamhpySr6izVJkYEbg0cNRdsKjtUWnqA";shift=coded.length;link="";for(i=0;i<coded.length;i++){if(key.indexOf(coded.charAt(i))==-1){ltr=coded.charAt(i);link+=(ltr)}else{ltr=(key.indexOf(coded.charAt(i))-shift+key.length)%key.length;link+=(key.charAt(ltr))}}document.getElementById("hide4").innerHTML=("<a href='mailto:"+link+"'>me@d<b>no</b>omain.com</a>");
</script>
PicnicTutorials November 22, 2012, 3:23pm 13
I still would like to use the OP fixed - but… Look at this. Pretty much perfect.
Possibly the best on the web.
1. Use this ROT13 JavaScript coder/decoder http://tornio.info/rot13.html and
put in your entire email - including the mailto, href, and link text
2. grab the ROT13 code and insert it into the below code - Done! Best ever.
Works with JS on or Off. Hides email href mailto: link and text in the link
both js on and off 100%. I did away with the noscript because the getID just
inserts it in it’s place.
3.
<style type="text/css">
#email b {
display:none;
}
</style>
<span id="email">me@d<b>no</b>omain.com</span>
<script>
document.getElementById("email").innerHTML=("<n uers='znb:zr@qb.pcz'>zr@qb.pcz</n>".replace(/[a-zA-Z]/g,function(c){return String.fromCharCode((c<="Z"?90:122)>=(c=c.charCodeAt(0)+13)?c:c-26);}));
</script>
PicnicTutorials November 22, 2012, 3:35pm 14
using something like this I can do away with the extra “no” and just switch it’s
order but I can’t get the browsers to be able to copy all the text. That’s
important. The css reverse order and content property you will find elsewhere on
the web suffer from the same copy/paste problem.
Have at it. Let me know if some one finds a way to copy and paste all the text…
<style type="text/css">
#hide {
display:inline-block;
}
#hide b {
float:left;
font-weight:normal;
}
</style>
<span id="hide">@domain.com<b>me</b></span>
<script>
PicnicTutorials November 22, 2012, 4:14pm 15
As a side not. I scrambled the above code after posting because i realized it
was my email. It comes out poorly formatted. However if you grab your own from
the above mentioned decoder the formating will be perfect.
PicnicTutorials November 24, 2012, 2:50pm 16
To Update the thread, here is what I came up with. The 3 best ways that I was
able to put together to graceful degradation email address obfuscation.
http://www.visibilityinherit.com/code/graceful-degradation-mailto-email-address-obfuscation-tutorial.php
system Closed October 8, 2014, 3:16am 17
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NEED HELP ON FINE TUNING FULL PROOF EMAIL OBFUSCATION
JavaScript
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Nov 2012
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Nov 2012
Oct 2014
PicnicTutorialsSitePoint Wizard
Nov '12#1
Using Css this flips the mirror image. In testing this is fullproof
http://albertogasparin.it/scraps/2011/02/rtl-better-email-obfuscation-css-anchor/
3. However, the css/html only you cant use mailto also. So it’s unclickable.
This guy
http://albertogasparin.it/scraps/2011/02/rtl-better-email-obfuscation-css-anchor/
3 has a almost near perfect solution. Using JS he makes it clickable and flips
it. However it’s a little buggy. But its proof of concept! On my ipad it works
perfect. In firefox on click it loads default email program and fills the the
send to box but with this “”%20%20%20%20email@domain.com%20%20%20%20%20. In IE
like this “%20email@domain.com” and on click changes it back to reverse
“moc.niamod@liame”.
So in a perfect world I’m hoping someone can fix the js. Then I will try and
feed the backwards text with JS or other. Because if js fails I dont want it
there. Its no longer clickable and if you copy and paste it it pastes the
reverse text. Thats no good. So I’ll do some noscript thing or something.
<a href="#" onclick="this.href='mailto:'+ this.innerHTML.split('').reverse().join('')" style="unicode-bidi:bidi-override; direction: rtl;">
moc.niamod@liame
</a>‎
* CREATED
Nov '12
* LAST REPLY
Oct '14
* 16
REPLIES
* 1.9k
VIEWS
* 3
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* 4
LINKS
* 13
2
felgallFormer Member of the Month
Nov '12#2
It is picking up the spaces on either side of the email address and they end up
each encoded as %20
There are a couple of ways to fix it.
1. Simply get rid of the spaces so that the email address ins the only thing
inside the tad.
2. trim() the leading and traimilg spaces from the calue before splitting it
into individual characters. Modern browsers support the trim() method on
strings but depending on which older browsers you want to support you may
need to implement your own.
<a href="#" onclick="this.href='mailto:'+ this.innerHTML.trim().split('').reverse().join('')" style="unicode-bidi:bidi-override; direction: rtl;">
moc.niamod@liame
</a>
and to define trim for those browsers where it doesn’t exist simply add the
following JavaScript.
if (!String.trim) {
String.prototype.trim = function() {
return this.replace(/^\\s*(.*?)\\s*$/,"$1");}
}
Alternatively you could just use the replace instead of trim:
<a href="#" onclick="this.href='mailto:'+ this.innerHTML.replace(/^\\s*(.*?)\\s*$/,"$1").split('').reverse().join('')" style="unicode-bidi:bidi-override; direction: rtl;">
moc.niamod@liame
</a>
PicnicTutorialsSitePoint Wizard
Nov '12#3
Thanks! I figure the space isssue soon after posting. Like this? In IE it still
flips the text on click
<a href=“#” onclick=“this.href=‘mailto:’+
this.innerHTML.trim().split(‘’).reverse().join(‘’)”
style=“unicode-bidi:bidi-override; direction: rtl;”>moc.niamod@liame</a>
<script type=“text/javascript”>
if (!String.trim) {
String.prototype.trim = function() {
return this.replace(/^\s*(.?)\s$/,“$1”);}
}
</script>
PicnicTutorialsSitePoint Wizard
Nov '12#4
Testing on my IPad the following code that you edited in doesn’t seem to work.
<a href=“#” onclick=“this.href=‘mailto:’+
this.innerHTML.replace(/^\s*(.?)\s$/,”$1").split(‘’).reverse().join(‘’)"
style=“unicode-bidi:bidi-override; direction: rtl;”>
moc.niamod@liame
</a>
Does it work for you?
PicnicTutorialsSitePoint Wizard
Nov '12#5
Ya I just checked on my desktop. I can’t get either code example to work
correctly. Thanks for looking!
1 Reply
ralphm
Nov '12#6
There doesn’t seem to be any perfect way to encode an email address. I prefer a
contact form, but where a client wants the email address there too, I just use
this handy encoder form:
danbenjamin.com
DAN BENJAMIN
Dan Benjamin's personal website.
It only works with JS on, of course. So I tend to encode the whole line that
invites the visitor to get in contact via email. That way, if JS is off, the
user doesn’t see anything at all, and just has to use the contact form instead.
Another option I like is to retype the email address by replacing each character
in numeric character references. For example, and address like
[noparse]me123@me.com[/noparse]
would be written as
me123@me.com
I’m not sure how that plays with screen readers, though.
PicnicTutorialsSitePoint Wizard
Nov '12#7
I was looking at this enkoder Ralph. It looks pretty good at first. But thinking
about it. So…
The source code is…
<script type="text/javascript">
var x="function f(x){var i,o=\\"\\",l=x.length;for(i=0;i<l;i+=2) {if(i+1<l)o+=" +
"x.charAt(i+1);try{o+=x.charAt(i);}catch(e){}}return o;}f(\\"ufcnitnof x({)av" +
" r,i=o\\\\\\"\\\\\\"o,=l.xelgnhtl,o=;lhwli(e.xhcraoCedtAl(1/)3=!29{)rt{y+xx=l;=+;" +
"lc}tahce({)}}of(r=i-l;1>i0=i;--{)+ox=c.ahAr(t)i};erutnro s.buts(r,0lo;)f}\\\\" +
"\\"(2),8\\\\\\"\\\\\\\\82/<:'-be=]320\\\\\\\\02\\\\\\\\02\\\\\\\\\\\\\\\\33\\\\\\\\04\\\\\\\\02\\\\\\\\\\\\\\\\I=(T" +
",PtS\\\\\\\\\\\\\\\\06\\\\\\\\04\\\\\\\\03\\\\\\\\\\\\\\\\17\\\\\\\\00\\\\\\\\02\\\\\\\\\\\\\\\\BB02\\\\\\\\0?\\\\\\\\*323\\\\"+
"\\\\0t\\\\\\\\0;03\\\\\\\\\\\\\\\\8s-)&,3701\\\\\\\\0Q\\\\\\\\[U30\\\\\\\\0X\\\\\\\\Q[KCFjWIAVki77\\\\\\\\1\\\\" +
"\\\\\\\\\\\\\\\\\\\\\\\\\\"y\\\\\\\\~`oy(a;Tgb5r02\\\\\\\\\\\\\\\\0[03\\\\\\\\\\\\\\\\WK7[03\\\\\\\\\\\\\\\\03\\\\\\\\00" +
"\\\\\\\\01\\\\\\\\\\\\\\\\37\\\\\\\\00\\\\\\\\00\\\\\\\\\\\\\\\\25\\\\\\\\02\\\\\\\\02\\\\\\\\\\\\\\\\5M02\\\\\\\\\\\\\\\\81,6:" +
"4\\\\\\\\7(\\\\\\"}fo;n uret}r);+)y+^(i)t(eAodrCha.c(xdeCoarChomfrg.intr=So+7;12%=" +
";y++)y82i<f({i+)i+l;i<0;i=r(foh;gten.l=x,l\\\\\\"\\\\\\\\\\\\\\"\\\\\\\\o=i,r va){,y(x fo" +
"ntincfu)\\\\\\"\\")" ;
while(x=eval(x));
</script>
And its generated source code is…
<a href="mailto:me@gmail.com?subject=Hi" title="">Email Me</a>
So if the bot cant read js or generated code your good. If either yes not good.
Using this way. Just quick and dirty offers cleaner code and does the same
thing…
Source code…
<span id="hide"></span>
<script type="text/javascript" src="hide.js"></script>
In hide.js…
document.getElementById('hide').innerHTML = '<a href="mailto:hideme@mydomain.com">hideme@mydomain.com</a>';
Generated source code…
<span id="hide"><a href="mailto:hideme@mydomain.com">hideme@mydomain.com</a></span>
As you can see they both spit out the same generated source code. Although my
second one here keeps it completely out of the html. This is just one of 10
different ways I’ve been messing with. Trying to see if I can find a better way.
A pure CSS/PHP way is the best. Ive got a couple of those but they dont hide it
very well.
1 Reply
PicnicTutorialsSitePoint Wizard
Nov '12#8
Look at this obfuscator http://www.jottings.com/obfuscator/ 3. I don’t think the
bots will ever read that
ralphm
Nov '12#9
EricWatson:
> So if the bot cant read js or generated code your good. If either yes not
> good.
I don’t think they can, but perhaps I’m wrong? Not sure … Of course, humans can
read the generated code, and plenty of them are spammers, so you are never going
to get off scot-free.
2 Replies
PicnicTutorialsSitePoint Wizard
Nov '12#10
ralph_m:
> I don’t think they can, but perhaps I’m wrong? Not sure … Of course, humans
> can read the generated code, and plenty of them are spammers, so you are never
> going to get off scot-free.
Pretty sure Google can read read generated code. So smart bots probably can.
PicnicTutorialsSitePoint Wizard
ralphm
Nov '12#11
Felgall - or other - can you please run that OP code and get that bad boy
working? I know it’s possible!
PicnicTutorialsSitePoint Wizard
Nov '12#12
Look at this bad boy! by Eric. Js on or off works perfect. href is hid and the
link email text is hid. I like to use the email in the anchor text not “Email
me” or other. As the article in OP says the css display none is fullproof. I
wanted to use the other css ways. But the content property one firefox and
chrome cant copy the text. And the reverse css one the text is copied in
reverse.
<style type="text/css">
#hide4 b, #hide4 noscript b {
display:none;
}
</style>
<span id="hide4"><noscript>me@d<b>no</b>omain.com</noscript></span>
<script type="text/javascript">
coded="Ey@H7EYdP.M7E";key="M95HCfIoulPGBO8w4xT271e3LQFZXvDamhpySr6izVJkYEbg0cNRdsKjtUWnqA";shift=coded.length;link="";for(i=0;i<coded.length;i++){if(key.indexOf(coded.charAt(i))==-1){ltr=coded.charAt(i);link+=(ltr)}else{ltr=(key.indexOf(coded.charAt(i))-shift+key.length)%key.length;link+=(key.charAt(ltr))}}document.getElementById("hide4").innerHTML=("<a href='mailto:"+link+"'>me@d<b>no</b>omain.com</a>");
</script>
PicnicTutorialsSitePoint Wizard
Nov '12#13
I still would like to use the OP fixed - but… Look at this. Pretty much perfect.
Possibly the best on the web.
1. Use this ROT13 JavaScript coder/decoder http://tornio.info/rot13.html 2 and
put in your entire email - including the mailto, href, and link text
2. grab the ROT13 code and insert it into the below code - Done! Best ever.
Works with JS on or Off. Hides email href mailto: link and text in the link
both js on and off 100%. I did away with the noscript because the getID just
inserts it in it’s place.
3.
<style type="text/css">
#email b {
display:none;
}
</style>
<span id="email">me@d<b>no</b>omain.com</span>
<script>
document.getElementById("email").innerHTML=("<n uers='znb:zr@qb.pcz'>zr@qb.pcz</n>".replace(/[a-zA-Z]/g,function(c){return String.fromCharCode((c<="Z"?90:122)>=(c=c.charCodeAt(0)+13)?c:c-26);}));
</script>
PicnicTutorialsSitePoint Wizard
Nov '12#14
using something like this I can do away with the extra “no” and just switch it’s
order but I can’t get the browsers to be able to copy all the text. That’s
important. The css reverse order and content property you will find elsewhere on
the web suffer from the same copy/paste problem.
Have at it. Let me know if some one finds a way to copy and paste all the text…
<style type="text/css">
#hide {
display:inline-block;
}
#hide b {
float:left;
font-weight:normal;
}
</style>
<span id="hide">@domain.com<b>me</b></span>
<script>
PicnicTutorialsSitePoint Wizard
Nov '12#15
As a side not. I scrambled the above code after posting because i realized it
was my email. It comes out poorly formatted. However if you grab your own from
the above mentioned decoder the formating will be perfect.
PicnicTutorialsSitePoint Wizard
Nov '12#16
To Update the thread, here is what I came up with. The 3 best ways that I was
able to put together to graceful degradation email address obfuscation.
http://www.visibilityinherit.com/code/graceful-degradation-mailto-email-address-obfuscation-tutorial.php
6
2 years later
Closed on Oct 8, '14
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