IE7 Cookies not persisting. Please help.

I'm new to cookies and rails so I apologize for my ignorance. I'm using Javascript to store persistent cookies using the following code (taken from the O'Reilly Javascript book):

Cookie.prototype.store = function( daysToLive, path, domain, secure ) {   var cookieval = "" ;

  for ( var prop in this )   {     // Ignore properties wiht names that begin with the '$' and also methods     if ( ( prop.charAt(0) == '$' ) || ( ( typeof this[prop]) == 'function' ) )       continue ;

    if ( cookieval != "" ) cookieval += '&' ;

    cookieval += prop + ':' + encodeURIComponent( this[prop] ) ;

  }   var cookie = this.$name + '=' + cookieval ;

  if ( daysToLive || daysToLive == 0 )   {     cookie += "; max-age=" + (daysToLive*24*60*60) ;   }

  if ( path ) cookie += "; path=" + path ;   if ( domain ) cookie += "; domain=" + domain ;   if ( secure ) cookie += "; secure" ;

  // Now store the cookie by setting the Document.cookie property   document.cookie = cookie ; }

This works fine in Firefox but in IE7 it seems to work like a session cookie. As soon as I close the browser it doesn't exist.

I'm certain it's something in Rails that I'm missing.

Thanks in advance for the help!

A few more details:

- I don't have any other cookies for the domain - There is not an underscore in the domain/subdomain - My privacy setting are at their lowest (accept all cookies) - The cookie is there and accessible until I close the browser and restart - I'm sure there's a simple Rails reason for all of this. I don't want to have to persist the session to make this work, is that even possible in Rails?

Thanks again.

Try the depricated expires attribute instead of max-age, which is not supported by IE. expires differs from max-age in that it sets a date (UTC) instead of a duration.