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function texttt(e,tt,on,t){
  var ttt = getE('tooltiptext'), lines, i, ts, xpos;
  if(on) {
    lines = t.split('\\n');
    xpos = '{$number:padding}px';
    if(!ttt) {
      ttt = newel('g', {
        id: 'tooltiptext',
        fill: '{$string:colour}',
        'font-size': '{$number:font_size}px',
        'font-family': '{$string:font}',
        'font-weight': '{$string:font_weight}',
        'text-anchor': '{$string:anchor}'
      });
      tt.appendChild(ttt);
    }
    while(ttt.childNodes.length > 0)
      ttt.removeChild(ttt.childNodes[0]);
    for(i = 0; i < lines.length; ++i) {
      ts = newel('text', { y: {$number:ttoffset} + ({$number:tty} * i) + 'px' });
      ts.appendChild(newtext(lines[i]));
      ts.innerHTML = ts.textContent;
      ttt.appendChild(ts);
    }
  }
  ttt && showhide(ttt,on);
  return ttt;
}