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function showCoords(de,x,y,bb,on) {
  var gx = getData(de, 'gridx'), gy = getData(de, 'gridy'),
    textList = getData(de,'chtext'), group, i, x1, y1,
    fnx = eval(gx.getAttributeNS(null, 'function')),
    fny = eval(gy.getAttributeNS(null, 'function')), textNode, rect, tbb, ti, ds;
  for(i = 0; i < textList.childNodes.length; ++i) {
    if(textList.childNodes[i].nodeName == 'svggraph:chtextitem') {
      ti = textList.childNodes[i];
      group = getE(ti.getAttributeNS(null, 'groupid'));
      if(on) {
        textNode = group.querySelector('text');
        rect = group.querySelector('rect');
        while(textNode.childNodes.length > 0)
          textNode.removeChild(textNode.childNodes[0]);
        textNode.appendChild(newtext({$string:text_format}));
        setattr(textNode, 'y', 0 + 'px');
        tbb = textNode.getBBox();
        ds = tbb.height + tbb.y;
        x1 = x + bb.x + {$number:pad_space};
        y1 = y + bb.y - {$number:pad_space} - ds;
        if(x1 + tbb.width + {$number:pad} > bb.x + bb.width)
          x1 -= group.getBBox().width + {$number:space2};
        if(y1 - tbb.height - {$number:pad} < bb.y)
          y1 = y + bb.y + tbb.height + {$number:pad_space} - ds;
        setattr(textNode, 'x', x1 + 'px');
        setattr(textNode, 'y', y1 + 'px');
        tbb = textNode.getBBox();
        fitRect(rect,tbb,{$number:pad});
      }
      showhide(group, on);
    }
  }
}