function SwitchRow(ParamRowID)
{
  if (document.getElementById(ParamRowID).style.display=='none')
  { document.getElementById(ParamRowID).style.display='block'; }
  else
  { document.getElementById(ParamRowID).style.display='none'; }
}

function QueryStringAdd(strName, strValue)
{
  strOperator='&';
  strLocation=QueryStringRemove(strName)
  if (strLocation=='') strOperator='?';
  strData=strOperator + strName + '=' + escape(strValue);
  return document.location.pathname + strLocation + strData;
}

function QueryStringRemove(strName)
{
  strResult=location.search;
  strResult=strResult.replace('&' + strName + '=' + QueryString(strName), '');
  strResult=strResult.replace('?' + strName + '=' + QueryString(strName), '');
  return strResult;
}

function QueryString(strParameter)
{
  var intBegin,intEnd;

  if(self.location.search.length>1) objString=self.location.search;
  else
   if(self.location.hash.length>1) objString=self.location.hash;
  else return('');

  intBegin=objString.indexOf(strParameter) + strParameter.length+1;
  intEnd=objString.indexOf('&',intBegin);
  if(intEnd==(-1)) intEnd=objString.length;
  return(objString.substring(intBegin,intEnd));
}