Cross Domain Access in Javascript

cross_domain.js

function filterData(data){
    //   data = data.replace(/<?\/body[^>]*>/g,'');
    //   data = data.replace(/[\r|\n]+/g,'');
    //   data = data.replace(/<--[\S\s]*?-->/g,'');
    //   data = data.replace(/<noscript[^>]*>[\S\s]*?<\/noscript>/g,'');
    //   data = data.replace(/<script[^>]*>[\S\s]*?<\/script>/g,'');
    //   data = data.replace(/<script.*\/>/,'');
    // data = data.replace(/<script[^>]+?\/>|<script(.|\s)*?\/script>/gi, '')
    data = data.replace(/<style[^>]+?\/>|<style(.|\s)*?\/style>/gi, '')
     
  return data;
}
 
/**
 * jQuery.ajax mid - CROSS DOMAIN AJAX 
 * ---
 * @author James Padolsey (http://james.padolsey.com)
 * @version 0.11
 * @updated 12-JAN-10
 * ---
 * Note: Read the README!
 * ---
 * @info http://james.padolsey.com/javascript/cross-domain-requests-with-jquery/
 */
 
jQuery.ajax = (function(_ajax){
     
    var protocol = location.protocol,
        hostname = location.hostname,
        exRegex = RegExp(protocol + '//' + hostname),
        YQL = 'http' + (/^https/.test(protocol)?'s':'') + '://query.yahooapis.com/v1/public/yql?callback=?',
        query = 'select * from html where url="{URL}" and xpath="*"';
     
    function isExternal(url) {
        return !exRegex.test(url) && /:\/\//.test(url);
    }
     
    return function(o) {
         
        var url = o.url;
         
        if ( /get/i.test(o.type) && !/json/i.test(o.dataType) && isExternal(url) ) {
             
            // Manipulate options so that JSONP-x request is made to YQL
             
            o.url = YQL;
            o.dataType = 'json';
             
            o.data = {
                q: query.replace(
                    '{URL}',
                    url + (o.data ?
                        (/\?/.test(url) ? '&' : '?') + jQuery.param(o.data)
                    : '')
                ),
                format: 'xml'
            };
             
            // Since it's a JSONP request
            // complete === success
            if (!o.success && o.complete) {
                o.success = o.complete;
                delete o.complete;
            }
             
            o.success = (function(_success){
                return function(data) {
     
                                        if (data.results.length > 0) {
                                            var res = filterData(data.results[0]);
                                              
                                          if (_success) {
                            _success.call(this, {
                                responseText: res
                            }, 'success');
                        }
                                        }
                                        else {
                                            if (_success) {
                            // Fake XHR callback.
                            _success.call(this, {
                                responseText: ""
                            }, 'success');
                        }
                                        }
                                         
                     
                     
                };
            })(o.success);
             
        }
         
        return _ajax.apply(this, arguments);
         
    };
     
})(jQuery.ajax)