/* OK */
popURL('blah.com');
/* Invalid */
popURL('broken.com/
cant/have/embedded/real/newline');

##</code><code>##

# before inserting a perl string into a quoted javascript
# widget we always need to do at least this:

# remove newlines and carriage returns
my $embed_string =~ s/[\n\r]//g;

# escape single quote chars - another gotcha
my $embed_string =~ s/'/\\'/g;