Double quote have never given an error, nor in Netbeans nor in browser (any browser)... not in my experience.
"The most important feature of double-quoted strings is the fact that variable names will be expanded." (http://php.net/manual/en/language.types.string.php)
Cheers
Marco Gasi
Ooops, I didn't thought to the others double quotes which styles ones were wrapped in!. I'm sorry.
like this :
Open in new window
And take a look here : http://www.campaignmonitor.com/css/