hn job query search

hn_seach.js

function query() {
  var 
    total = 0, shown = 0,
    job_list = Array.prototype.slice.call(document.querySelectorAll('.c00,.cdd')),
    query_list = Array.prototype.slice.call(arguments);

  // turn them all off
  job_list.forEach(function(node) {
    node.parentNode.parentNode.parentNode.style.display = 'none';
    total ++;
  });

  query_list.forEach(function(query) {
    if (query.forEach) {
      var and_query_list = query.map(function(what) { return what.toLowerCase(); });

      job_list.forEach(function(node) {
        var doesMatch = true, toTest = node.innerHTML.toLowerCase();
        and_query_list.forEach(function(query) {
          doesMatch &= (toTest.search(query) > -1);
        })
        if(doesMatch) {
          node.parentNode.parentNode.parentNode.style.display = 'block';
          shown ++;
        }
      });

    } else {
      query = query.toLowerCase();
      job_list.forEach(function(node) {
        if(node.innerHTML.toLowerCase().search(query) !== -1) {
          node.parentNode.parentNode.parentNode.style.display = 'block';
          shown ++;
        }
      });
    }
  });
  return {shown: shown, total: total}
}