Problem with Facebook "Like" Code

[peter_schneider]

The code of Facebook's Like button (javascript included to my php script) contains one line that causes some browsers to post a complete page request twice to my server. This causes some malfunctions cause parts of my code are programmed not to accept doubleposted requests. however, the user doesnt get to see the first but the 2nd loaded page in his browser - the one with the error message of my server in.

It could be the use of two kinds of quotation marks that causes the double request in some browsers (not in most current browsers).
If I delete the line, everything's fine, just the Facebook Like button wont work then ...
Here is the line:
document.writeln('<fb:like href="http://domainname.com" layout="button_count" show_faces="false"></fb:like>');

I slash out the single quotation marks to get the thing going within an echo '...';
Any ideas? Maybe the codeline could be rewritten using one type of quotation marks only?

[bradgrafelman]

Why would the types of quotation marks matter? Since the JS string is single-quote delimited, the double quotes in that string are treated no differently than the letter 'h'.

[peter_schneider]

ok then it must have something to do with: document.writeln() ??

[bradgrafelman]

What about it? It adds whatever string of text you give it to the document (with the addition of a newline character appended to the end of the string).

[peter_schneider]

i dont know - i just know that if i delete that line from the code the problem doesnt appear