function searchIt(e) {
  var submitIt = false;

  if (sInput && sInput.value.length >= 3) {
    submitIt = true;
    // make sure it's not a common word
    for (var i = 0; i < commonWords.length; i++) {
      if (sInput.value == commonWords[i]) {
        submitIt = false;
        alert('Please enter a less common word as your search term');
        break;
      }
    }

    if (submitIt === true) {
      searchForm.submit();
    } else {
      searchForm.reset();
    }
  } else {
    alert('Please enter a search term that is at least 3 characters long');
  }
}

function listenForSearch(e) {
  searchForm = document.getElementById('searchForm');
  sImg = document.getElementById('sImg');
  sInput = document.getElementById('sInput');

  if (sImg.addEventListener) {
    sImg.addEventListener('click', searchIt, false);
  } else if (sImg.attachEvent) {
    sImg.attachEvent('onclick', searchIt);
  } else if (sImg.onclick) {
    sImg.onclick = searchIt;
  }
}

var searchForm;
var sImg;
var sInput;
var commonWords = ['and', 'the', 'then', 'that']

if (window.addEventListener) {
  window.addEventListener('load', listenForSearch, false);
} else if (window.attachEvent) {
  window.attachEvent('onload', listenForSearch);
} else if (window.onload) {
  window.onload = listenForSearch;
}