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function xy_percent(n, m)
{
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  } else if (m == 'y') {
    return (100 * n) / $(window).height();
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}
function percent_xy(n, m)
{
  if(m == 'x') {
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  } else if (m == 'y') {
    return (n * $(window).height()) / 100;
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}