function open_faq(url)
{
   var name = "faq_browser";
   var properties = new Array();
   properties["width"] = 655;
   properties["height"] = 475;
   properties["left"] = (screen.availWidth - properties["width"]) / 2;
   properties["top"] = (screen.availHeight - properties["height"]) / 2;
   properties["location"] = "no";
   properties["menubar"] = "no";
   properties["resizable"] = "yes";
   properties["scrollbars"] = "yes";
   properties["status"] = "no";
   properties["toolbar"] = "no";
   var properties_string = "";
   for (var property in properties) 
   { 
         properties_string += property + "=" + properties[property] + " , ";
   }
   window.open (url , name , properties_string);
}