how to know if someone is logged via javascript?

Question

in php i would do

if (isset($_COOKIE[\'user\']) && $_COOKIE[\'user\'] == $valueFromDb)
 echo \'logged\';

But in javascript how can

Answer 1

Yes. check out this question: Create, read, and erase cookies with jQuery

a plugin to make it even easier for you: http://plugins.jquery.com/project/cookie