Improve Support For Science Direct URL Formats

[tjowens]

The basic URLs work

​http://www.sciencedirect.com/science/journal/01676296

But the long internal URLs are failing to translate. The detect code properly returns the multiple items icon, but clicking it produces a error.

​http://www.sciencedirect.com/science?_ob=PublicationURL&_tockey=%23TOC%235873%232009%23999719996%231024691%23FLA%23&_cdi=5873&_pubType=J&_auth=y&_acct=C000051857&_version=1&_urlVersion=0&_userid=1177143&md5=b95d0bd1cfce672d35aca46607701e00

See: ​http://forums.zotero.org/discussion/7074/

[tjowens]

User cfingerh in the forums suggested this fix:

I tried to figure out the translator and found a solution to the problem.

I changed in the ScienceDirect.js translator file the two lines

xpath = 'table[@class="txt"]/tbody/tr/td[2]';

to

xpath = 'div[@class="font3"][@id="bodyMainResults"]/table/tbody/tr/td[2]/a';

I'm not expert in translators, so maybe it would be good that somebody else checks this and maybe update the translator

[mcburton]

(In [4601]) Fixes #1478, tweaked xpath and added logic to catch empty selectItems arrays.