A vs B testing - Coding Question

[steve8383]

Just got the email from Inside Adsense announcing the A vs B testing. What this means is you can now run 2 different ads side by side, showing one 50% of the time and the other 50% of the time (or whatever frequency you choose)

You can then compare performance and decide which one is the better performer and then test against another style, until you have optimum performance.

I tried to set this up already on my busy forum which has horrendous click thru rate, but having problems with the coding. In accordance with the email instructions this is what I have:

<script type=”text/javascript”>
var random_number = Math.random();
if (random_number < .5){
<!--
google_ad_client = "pub-#*$!#*$!#*$!#*$!xx";
google_ad_width = 728;
google_ad_height = 90;
google_ad_format = "728x90_as";
google_ad_type = "text_image";
google_ad_channel ="7359756599";
google_color_border = "E3F0FB";
google_color_link = "072978";
google_color_bg = "E3F0FB";
google_color_text = "000000";
google_color_url = "000000";
//-->
} else {
<!--
google_ad_client = "pub-#*$!#*$!#*$!#*$!#*$!xx";
google_ad_width = 728;
google_ad_height = 90;
google_ad_format = "728x90_as";
google_ad_type = "text_image";
google_ad_channel ="1866443525";
google_color_border = "E3F0FB";
google_color_bg = "E3F0FB";
google_color_link = "CC0000";
google_color_text = "CC0000";
google_color_url = "CC0000";
//-->
}
</script>
<script type="text/javascript" src="http://pagead2.googlesyndication.com/pagead/show_ads.js"></script>

Can anyone spot the 'deliberate' mistake I've made as no ads at all are showing using the code above?

[greatstart]

I found the help on this topic at the AdSense Help Center - [google.com...]

and more info here - [adsense.blogspot.com...]

[steve8383]

Thanks, I read those though and thought I followed the instructions properly. Still can't get it to work though.

I'm pretty simple when it comes to java

[jomaxx]

I'm far from a Javascript guru but I don't think those begin/end comments tags should be within the Javascript code.

[jurii]

Do you have any errors in your Javascript Console?

Open the page with Firefox and type javascript: in the address bar. You will get errors with Adsense anyway, but look for any more errors.

And try this:

<script type=”text/javascript”>
<!--
var random_number = Math.random();
if (random_number < .5){
google_ad_client = "pub-#*$!#*$!#*$!#*$!xx";
google_ad_width = 728;
google_ad_height = 90;
google_ad_format = "728x90_as";
google_ad_type = "text_image";
google_ad_channel ="7359756599";
google_color_border = "E3F0FB";
google_color_link = "072978";
google_color_bg = "E3F0FB";
google_color_text = "000000";
google_color_url = "000000";
} else {
google_ad_client = "pub-#*$!#*$!#*$!#*$!#*$!xx";
google_ad_width = 728;
google_ad_height = 90;
google_ad_format = "728x90_as";
google_ad_type = "text_image";
google_ad_channel ="1866443525";
google_color_border = "E3F0FB";
google_color_bg = "E3F0FB";
google_color_link = "CC0000";
google_color_text = "CC0000";
google_color_url = "CC0000";
}
//-->
</script>
<script type="text/javascript" src="http://pagead2.googlesyndication.com/pagead/show_ads.js"></script>

[esllou]

I am trying to set this up to and used the code posted by jurii to no avail....still not getting any ads showing and FF reports the following JS error:

"b has no properties"

has anyone got this running?

I've now posted on the Adsense G Group board and will see if I get any help there.

[Rodney]

I tried the code jurii posted (and tried different variations of the code the adsense team recommended), but I can't get it to work either.

Anybody?

[esllou]

I've cracked it, by jove!

look at the quotation marks in the first line of code..the forum must have mangled them. I put in normal ones and it seems to be working.

Is it possible to do A/B/C testing?

How would I change this:

if (random_number < .5){

[CarKnee]

A/B/C testing:
The random number is always (slightly) less than 1. Therefore the A/B testing is assuming that 1/2 the time you will get a random number <.5 and the other 1/2 will get you a number >.5

To do A/B/C just split up .9 into thirds.

if (random_number < .33)
{
// A
}
else if (random_number >= .33 && random_number < .66)
{
//B
}
else
{
//C
}

*** This has not been tested.

[Bddmed]

look at the quotation marks in the first line of code

The adsense blog also has the wrong quotation marks.

Thanks for the solution.

[Rodney]

Brilliant detective work, esllou! Thanks for posting the fix!