src/PhantomPoll.js
function(callback) {
		if (this.instance) {
			this.instance.createPage(function(page) {
				callback(page);
			});
		} else {
			var that = this;
			this._createInstance(function() {
				that.createPage(callback);
			});
		}
	}
function(callback) {
		if (this.instance) {
			this.instance.createPage(function(page) {
				callback(page);
			});
		} else {
			var that = this;
			this._createInstance(function() {
				that.createPage(callback);
			});
		}
	}
function ( callback ) { if ( this . instance ) { this . instance . createPage ( function ( page ) { callback ( page ) ; } ) ; } else { var that = this ; this . _createInstance ( function ( ) { that . createPage ( callback ) ; } ) ; } }
Creates a PhantomJS page, to be called with a callback, which
will receive the page.

@param  {!function(?)} callback Function to be called after the
page is created, it receives the page object.
@public
Creates a PhantomJS page to be called with a callback which will receive the page .