function importScript(src) {
  var script = document.createElement("script");
  script.type = "text/javascript";
  script.src = src;
  document.getElementsByTagName("head")[0].appendChild(script);
  }

function a(js) {
  importScript(js);

  b = b * 5;
  document.getElementById("某div").innerHTML = b;
  }


a("1.js");

b = 9;

function a(js) {
  importScript(js);

  b = b * 5;
  document.getElementById("某div").innerHTML = b;
  }

b = 9;

var Scriptaculous = {
  Version: '1.6.1',
  require: function(libraryName) {
    // inserting via DOM fails in Safari 2.0, so brute force approach
    document.write('<script type="text/javascript" src="'+libraryName+'"></script>');
  },
  load: function() {
    if((typeof Prototype=='undefined') ||
       (typeof Element == 'undefined') ||
       (typeof Element.Methods=='undefined') ||
       parseFloat(Prototype.Version.split(".")[0] + "." +
                  Prototype.Version.split(".")[1]) < 1.5)
       throw("script.aculo.us requires the Prototype JavaScript framework >= 1.5.0");
   
    $A(document.getElementsByTagName("script")).findAll( function(s) {
      return (s.src && s.src.match(/scriptaculous\.js(\?.*)?$/))
    }).each( function(s) {
      var path = s.src.replace(/scriptaculous\.js(\?.*)?$/,'');
      var includes = s.src.match(/\?.*load=([a-z,]*)/);
      (includes ? includes[1] : 'builder,effects,dragdrop,controls,slider').split(',').each(
       function(include) { Scriptaculous.require(path+include+'.js') });
    });
  }
}

Scriptaculous.load();