Function has

scripts/table_addNumberColumn.js:14–17

(par, ctag)

  contentScript: {
    onClick: function () {
      function has(par, ctag) {
        for (var k = 0; k < par.childNodes.length; ++k)
          if (par.childNodes[k].tagName == ctag) return true;
      }

      function add(par, ctag, text) {
        var c = document.createElement(ctag);