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  1. #1
    Affiliate Manager
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    Silly SEO question
    There is a page full of such links:

    Code:
    <a class=txt-hyperlink  onclick="javascript:GetSelectedTag('http://www.domain.com/tag/category/some-page.aspx','Page Name');" >
    could google, or any other SE for that matter, be able to crawl through these?

    thanks!
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  2. #2
    ABW Ambassador JoyUnltd's Avatar
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    I heard about links like this, think it's called "dynamic linking" which is used so SEs will skip over and not count as a link from a page. There's a way to do affiliate links like this, but with rel="nofollow" tag, I believe this other method isn't necessary. (At least for white hat purposes). But if this is a spam page, that's another story.
    Renée
    Pay no attention to that woman behind the curtain. -Wizardress of Oz

  3. #3
    Affiliate Manager MINDsprinter's Avatar
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    No they can't. Java links most SE's can't follow.
    Jason Rosenbaum
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  4. #4
    Comfortably Numb John Powell's Avatar
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    48 hours and this post is #9 in Google for the term "GetSelectedTag". Shows that when ABW talks the world listens I reckon.

    Edit: I was cached on Dec. 03, 2006 which is the day after the post.

  5. #5
    Member SLAPPA's Avatar
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    Quote Originally Posted by MINDsprinter
    No they can't. Java links most SE's can't follow.
    I suspect that they can (but don't yet), and without a doubt will start following js links in the future. IMO- the best way to mask your links is would be to add a link table to your database and set your links up as such:

    <a href=''http://www.domain.com/scripts/links.aspx?go=1234'' rel="nofollow">

    Then in your robots.txt file disallow the /scripts/ folder.

  6. #6
    Affiliate Manager MINDsprinter's Avatar
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    Volare's probably right, this seems like a better longterm option. However, I've have yet to see an SE crawl java links (or flash links for that matter) regularly.
    Jason Rosenbaum
    Affiliate Manager
    MINDsprinting

  7. #7
    ABW Ambassador netnow22's Avatar
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    I have evidence that google can crawl javascript links as of recently

  8. #8
    Affiliate Manager MINDsprinter's Avatar
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    Really? I have seen an occasional crawl of java links, but nothing regular. Perhaps google is testing new spider software?
    Jason Rosenbaum
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  9. #9
    ABW Ambassador netnow22's Avatar
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    Yes, they are, I read an article at searchenginenews.com and seen the results at one of my custom javascript sites, However I am unsure why google would want to do this? It seems to me like it would be a waste of bandwidth? Maybe they are partnering up with the asp.net 2.0 plaftorm which in some cases uses alot of javascript

  10. #10
    Not that fat. ReallyBigGuy's Avatar
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    In my testing the past few weeks, I created a test page with some funky javascript functions with url's in them, and pointed to brand new pages, and within a couple days, it was on googles search, so they must query the pages for http or something to get them. The only ways I found to not get them in there was rel=nofollow, robots.txt, or very dynamically built urls inside javascript.

  11. #11
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    Wow, Didn't notice there were so many replies here.
    I finally got the programmers to include proper html links in there somehow. They were telling me it's not possible which had got me really worried and wondering if the js links could be crawled. I think even if googlebot has begun to crawl JS links now, it'd be a safe bet to just have proper HTML ones.
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  12. #12
    Full Member Tech Evangelist's Avatar
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    Google can crawl fully-formed URLs in JavaScript links, but they don't do it all of the time. Google can read some JavaScript, but they cannot execute it. Fully formed URLs set up a pattern that is easy to parse from code. The JavaScript links that no search engine can crawl are the links that are assembled on-the-fly by most JavaScript menus. Because they cannot execute the JavaScript code, they cannot assemble the URLs.

    If you want to hide the URLs, it may be better to put them in an external JavaScript file in an array and call them based upon a reference number or code.

    If you want to block the links, it is a good idea to use the rel="nofollow" attribute. Search engines do not always obey this, but they do most of the time.

    Theoretically, neither links in JavaScript nor links with the nofollow attribute pass any link value to the receiving page, so the link does not count as a backlink. However, I have recently seen Yahoo displaying backlinks from AdSense ads, which are JavaScript.

    BTW, there is no such thing as a Java link. Java and JavaScript are two different languages that operate differently. Java was developed by Sun Microsystems. JavaScript was developed by Netscape.
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  13. #13
    Full Member Tech Evangelist's Avatar
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    There is a big difference between executing JavaScript and reading a fully-formed URL in a script. Reading and executing JavaScript are two very different things. Theoretically, a spider cannot execute JavaScript. They can however read a fully-formed URL in code. The latter part is quite easy to do. Do they always read these links? No, but I have seen numerous incidents where they sometimes do.

    Google has been known to read JavaScript since the summer of 2004 when they banned all of the clients of a Las Vegas SEO firm that was using JavaScript redirects as a black hat cloaking technique. Since then, using JavaScript redirects has been considered to be a good way to get your site into trouble with Google.

    I've seen hundreds of incidents over the past year where Yahoo is picking up backlinks from AdSense ads. I first started noticing a lot of backlinks from strange URLs. If you follow the backlink to the original page, you do not find a link to your site, but you do find AdSense ads. This is bit perplexing because with AdSense no AdSense hyperlink actually appears in the code for the page displaying the ad. This leads me to believe that Yahoo is also experimenting with reading JavaScript, but it appears that they would have to be executing it in order to follow the link. I've actually picked up some temporary backlinks from Amazon.com from pages that displayed AdSense ads.
    There's good, fast and cheap. Pick any two.
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