the character '&' in urls of a html file is marked incorrect, see the image below:
Image is here: http://imgur.com/uYaLhnF
I don't know how to search this problem in google, so I post it here.
You should use HTML entities even for ampersands inside attributes, meaning you should replace your & with &
Otherwise, the ampersands can be considered ambiguous: w3.org/html/wg/drafts/html/m ... -ampersand