function keyStrValueY(de,y,h,g,ub,ua) {
  var z = g.getAttributeNS(null, 'zero'), s = g.getAttributeNS(null, 'scale'),
    p = g.getAttributeNS(null, 'precision'), keys = getData(de, 'keys'),
    rfnc = eval(g.getAttributeNS(null, 'round')), str = '', n = 0, i = 0,
    v = rfnc((y - z) / s);
  if(keys) {
    while(i <= v && n < keys.childNodes.length) {
      if(keys.childNodes[n].nodeName == 'svggraph:key') {
        if(i == v)
          str = keys.childNodes[n].getAttributeNS(null,'value');
        ++i;
      }
      ++n;
    }
  }
  return str;
}