function getCSSRule(ruleName, deleteFlag)
{ ruleName=ruleName.toLowerCase();
  if (document.styleSheets)
{ for (var i=0; i<document.styleSheets.length; i++)
{ var styleSheet=document.styleSheets[i];
  var ii=0;
  var cssRule=false;
  do
{ if (styleSheet.cssRules)
{ cssRule = styleSheet.cssRules[ii];
} else
{ cssRule = styleSheet.rules[ii];
} if (cssRule)
{ if (cssRule.selectorText.toLowerCase()==ruleName)
{ if (deleteFlag=='delete')
{ if (styleSheet.cssRules)
{ styleSheet.deleteRule(ii);
} else
{ styleSheet.removeRule(ii);
} return true;
} else
{ return cssRule;
}
}
} ii++;
} while (cssRule)
}
} return false;
}
  function c(tid)
{ var global = getCSSRule(tid);
  if (global.style.display=='block') global.style.display='none';
  else global.style.display='block';
}