问在HTML中对齐小数点

EN

(function() {
  var currencies = /(\$|€|€)/;
  var leftWidth = 0, rightWidth = 0;
  for(var tableCounter = 0, tables = document.getElementsByTagName("table");
      tableCounter < tables.length; tableCounter++) {
    if(tables[tableCounter].className.indexOf("fix-align-char") != -1) {
      var fCols = [], leftPart, rightPart, parts;
      for(var i = 0, cols = tables[tableCounter].getElementsByTagName("col"); i < cols.length; i++) {
        if(cols[i].getAttribute("char")) {
          fCols[i] = cols[i].getAttribute("char");
        }
      }
      for(var i = 0, trs = tables[tableCounter].rows; i < trs.length; i++) {
        for(var j = 0, tds = trs[i].getElementsByTagName("td"); j < tds.length; j++) {
          if(fCols[j]) {
            if(tds[j].innerHTML.indexOf(fCols[j]) != -1) {
              parts = tds[j].innerHTML.split(fCols[j]);
              leftPart = parts.slice(0, parts.length -1).join(fCols[j]);
              leftPart = leftPart.replace(currencies, "<span class='currency'>$1</span>");
              rightPart = fCols[j] + parts.pop();
              tds[j].innerHTML = "<span class='left'>" + leftPart + "</span><span class='right'>" + rightPart + "</span>";
            } else {
              tds[j].innerHTML = tds[j].innerHTML.replace(currencies, "<span class='currency'>$1</span>");
              tds[j].innerHTML = "<span class='left'>" + tds[j].innerHTML + "</span>";
            }
            tds[j].className = "char-align";
            var txt = document.createTextNode(tds[j].firstChild.offsetWidth);
            if(leftWidth < tds[j].firstChild.offsetWidth) {
              leftWidth = tds[j].firstChild.offsetWidth;
            }
            if(tds[j].childNodes[1]) {
              txt = document.createTextNode(tds[j].childNodes[1].offsetWidth);
              if(rightWidth < tds[j].childNodes[1].offsetWidth) {
                rightWidth = tds[j].childNodes[1].offsetWidth;
              }
            }
          }
        }
      }
    }
  }
  // This is ugly and should be improved (amongst other parts of the code ;)
  var styleText = "\n" +
      "<style type='text/css'>\n" +
      "  .fix-align-char td.char-align { width: " + (leftWidth + rightWidth) + "px; }\n" +
      "  .fix-align-char span.left { float: left; text-align: right; width: " + leftWidth + "px; }\n" +
      "  .fix-align-char span.currency { text-align: left; float: left; }\n" +
      "  .fix-align-char span.right { float: right; text-align: left; width: " + rightWidth + "px; }\n" +
      "</style>\n";
  document.body.innerHTML += styleText;
})();

table {
  border-collapse: collapse;
  width: 600px;
}
th {
  padding: .5em;
  background: #eee;
  text-align: left;
}
td {
  padding: .5em;
}
#only-css td.char-align {
  width: 7em;
}
#only-css span.left {
  float: left;
  width: 4em;
  text-align: right;
}
#only-css span.currency {
  float: left;
  width: 2em;
  text-align: left;
}
#only-css span.right {
  float: right;
  width: 3em;
  text-align: left;
}

<table id="only-css">
  <thead>
    <tr>
      <th>Number</th>
      <th>Description</th>
      <th>Costs</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>1</td>
      <td>Lorem ipsum dolor sit amet</td>
      <td class="char-align">
        <span class="left">
          <span class="currency">$</span>3
        </span>
        <span class="right">,99</span>
      </td>
    </tr>
    <tr>
      <td>2</td>
      <td>Consectetuer adipiscing elit</td>
      <td class="char-align">
        <span class="left">
          <span class="currency">$</span>13
        </span>
        <span class="right">,95</span>
      </td>
    </tr>
    <tr>
      <td>3</td>
      <td>Pellentesque fringilla nisl ac mi</td>
      <td class="char-align">
        <span class="left">
          <span class="currency">$</span>4
        </span>
        <span class="right"></span>
      </td>
    </tr>
    <tr>
      <td>4</td>
      <td>Aenean egestas gravida magna</td>
      <td class="char-align">
        <span class="left">
          <span class="currency">$</span>123
        </span>
        <span class="right">,999</span>
      </td>
    </tr>
  </tbody>
</table>

table {border-collapse:collapse;}
td {padding:0px;margin:0px;border:0px;}
td+td {text-align:right;}
td, td+td+td {text-align:left;}

<table>
    <tr><th>Name</th><th colspan=2>Height</th></tr>
    <tr><td>eiffeltower</td> <td>324</td> <td></td></tr>
    <tr><td>giraffe</td> <td>5</td> <td>,30</td></tr>
    <tr><td>deer</td> <td>1</td> <td></td></tr>
    <tr><td>mouse</td> <td>0</td> <td>,03</td></tr>
</table>