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            Ext.fly(form).set({
                target: id,
                method: POST,
                enctype: encoding,
                encoding: encoding,
                action: url || buf.action
            });

            // add dynamic params
            Ext.iterate(Ext.urlDecode(ps, false), function(k, v){
                hd = doc.createElement('input');
                Ext.fly(hd).set({
                    type: 'hidden',
                    value: v,
                    name: k
                });
                form.appendChild(hd);
                hiddens.push(hd);
            });

            function cb(){
                var me = this,
                    // bogus response object
                    r = {responseText : '',
                         responseXML : null,
                         argument : o.argument},
                    doc,
                    firstChild;

                try{
                    doc = frame.contentWindow.document || frame.contentDocument || WINDOW.frames[id].document;
                    if(doc){
                        if(doc.body){
                            if(/textarea/i.test((firstChild = doc.body.firstChild || {}).tagName)){ // json response wrapped in textarea
                                r.responseText = firstChild.value;
                            }else{
                                r.responseText = doc.body.innerHTML;
                            }
                        }
                        //in IE the document may still have a body even if returns XML.
                        r.responseXML = doc.XMLDocument || doc;
                    }
                }
                catch(e) {}

                Ext.EventManager.removeListener(frame, LOAD, cb, me);

                me.fireEvent(REQUESTCOMPLETE, me, r, o);

                function runCallback(fn, scope, args){
                    if(Ext.isFunction(fn)){
                        fn.apply(scope, args);
                    }
                }

                runCallback(o.success, o.scope, [r, o]);
                runCallback(o.callback, o.scope, [o, true, r]);

                if(!me.debugUploads){
                    setTimeout(function(){Ext.removeNode(frame);}, 100);
                }
            }

            Ext.EventManager.on(frame, LOAD, cb, this);
            form.submit();

            Ext.fly(form).set(buf);
            Ext.each(hiddens, function(h) {
                Ext.removeNode(h);
            });
        }
    });
})();

<span id='Ext-Ajax'>/**
</span> * @class Ext.Ajax
 * @extends Ext.data.Connection
 * &lt;p&gt;The global Ajax request class that provides a simple way to make Ajax requests
 * with maximum flexibility.&lt;/p&gt;
 * &lt;p&gt;Since Ext.Ajax is a singleton, you can set common properties/events for it once
 * and override them at the request function level only if necessary.&lt;/p&gt;
 * &lt;p&gt;Common &lt;b&gt;Properties&lt;/b&gt; you may want to set are:&lt;div class=&quot;mdetail-params&quot;&gt;&lt;ul&gt;
 * &lt;li&gt;&lt;b&gt;&lt;tt&gt;{@link #method}&lt;/tt&gt;&lt;/b&gt;&lt;p class=&quot;sub-desc&quot;&gt;&lt;/p&gt;&lt;/li&gt;
 * &lt;li&gt;&lt;b&gt;&lt;tt&gt;{@link #extraParams}&lt;/tt&gt;&lt;/b&gt;&lt;p class=&quot;sub-desc&quot;&gt;&lt;/p&gt;&lt;/li&gt;
 * &lt;li&gt;&lt;b&gt;&lt;tt&gt;{@link #url}&lt;/tt&gt;&lt;/b&gt;&lt;p class=&quot;sub-desc&quot;&gt;&lt;/p&gt;&lt;/li&gt;
 * &lt;/ul&gt;&lt;/div&gt;
 * &lt;pre&gt;&lt;code&gt;
// Default headers to pass in every request
Ext.Ajax.defaultHeaders = {
    'Powered-By': 'Ext'
};
 * &lt;/code&gt;&lt;/pre&gt;
 * &lt;/p&gt;
 * &lt;p&gt;Common &lt;b&gt;Events&lt;/b&gt; you may want to set are:&lt;div class=&quot;mdetail-params&quot;&gt;&lt;ul&gt;
 * &lt;li&gt;&lt;b&gt;&lt;tt&gt;{@link Ext.data.Connection#beforerequest beforerequest}&lt;/tt&gt;&lt;/b&gt;&lt;p class=&quot;sub-desc&quot;&gt;&lt;/p&gt;&lt;/li&gt;
 * &lt;li&gt;&lt;b&gt;&lt;tt&gt;{@link Ext.data.Connection#requestcomplete requestcomplete}&lt;/tt&gt;&lt;/b&gt;&lt;p class=&quot;sub-desc&quot;&gt;&lt;/p&gt;&lt;/li&gt;
 * &lt;li&gt;&lt;b&gt;&lt;tt&gt;{@link Ext.data.Connection#requestexception requestexception}&lt;/tt&gt;&lt;/b&gt;&lt;p class=&quot;sub-desc&quot;&gt;&lt;/p&gt;&lt;/li&gt;
 * &lt;/ul&gt;&lt;/div&gt;
 * &lt;pre&gt;&lt;code&gt;
// Example: show a spinner during all Ajax requests
Ext.Ajax.on('beforerequest', this.showSpinner, this);
Ext.Ajax.on('requestcomplete', this.hideSpinner, this);
Ext.Ajax.on('requestexception', this.hideSpinner, this);
 * &lt;/code&gt;&lt;/pre&gt;
 * &lt;/p&gt;
 * &lt;p&gt;An example request:&lt;/p&gt;
 * &lt;pre&gt;&lt;code&gt;
// Basic request
Ext.Ajax.{@link Ext.data.Connection#request request}({
   url: 'foo.php',
   success: someFn,
   failure: otherFn,
   headers: {
       'my-header': 'foo'
   },
   params: { foo: 'bar' }
});

// Simple ajax form submission