Defeat the hash #

antihashbang.js

form = document.querySelector("form");
form.addEventListener("submit", function(event) {
  e.preventDefault();
  window.location = this.action + "#q=" + this.elements[1].value
}

// or you could wrap it in a domready container ie.

var domReady = function() {
  n = document.querySelector("form"), n.addEventListener("submit", function(e) {
    return e.preventDefault(), window.location = this.action + "#gsc.q=" + this.elements[1].value
  });
};
window.attachEvent ? window.attachEvent("onload", domReady) : document.addEventListener("DOMContentLoaded", domReady, !1);