Please, give an example of load and use jquery

[eugen35]

var phridge = require("phridge");
var path = require("path");
var jqueryPath = path.resolve(__dirname, "jquery-1.6.1.min.js");

phridge.spawn()
.then(function (phantom) {
return phantom.openPage("http://localhost:3000/");
})
.then(function (page) {
page.injectJs(jqueryPath);
return page.run(function () {
return this.evaluate(function () {
return $("button").innerText;
});
});
})

gives an error: TypeError: page.injectJs is not a function