var allowed_characters = 'Only these characters are allowed for usernames:\n\n' + ' - letters (upper and lower case)\n' + ' - numbers (from 0 to 9)\n' + ' - dot (.)\n' + ' - underscore (_)\n' + ' - hyphen (-)\n\nThe username must be 3 or more characters.'
var compulsory_fields  = 'Please, fill all the compulsory fields'
var invalid_login      = 'This username is not valid. May be this username is already in use or it is misspelled. ' + allowed_characters
var must_accept        = 'You must read and accept the conditions of use to be able to sign up'
var opera_browser      = 'You are using the Opera browser. You should know that ShareUsers has a known problem with this browser that could cause loss of data. <a href="javascript:openInNewWindow(\'/help/is-there-a-problem-with-opera/\');">More information</a>'