title: IE and unspecified error and in IE8 object doesn't support method
body: <p>I have a big (probably) javascript problem.</p>
  
  <p>i have a long and complex script on the page based on mootools framework,
  in FF and other browser everything works fine, but in ie 6 and 7 i got "error:153 (sometimes 84) Unspecified error" and the strange thing is in IE8 that show me the error "Object doesn't support this property or method".</p>
  
  <p>someone know the possible cause of the problem? o maybe someone know a list of IE's unsupported property or method?</p>