问从javascript进行http调用时出现故障

EN

onReady: function() {

        var makeAjaxRequest = function() {


        var myUrl = encodeURI('http://domainname/VW-MAPP/fgnwasxuyu/10548168/2012-04-11 12:42:36/5555');
    Ext.Ajax.request({

        method: 'get',
    url:  myUrl,

    success: function(response)      {     
    alert(''+response.responseText);     
    console.log("response:-"+response.responseText);      },     
    failure: function (response)      {     
    console.log("Failure");    
    console.log("response status:-"+response.status);
    alert("Failure");
}
            });
        };



        new Ext.Panel({
            fullscreen: true,
            id: 'content',
            scroll: 'vertical',
            dockedItems: [{
                xtype: 'toolbar',
                dock: 'top',
                items: [{
                    text: 'XMLHTTP',
                    handler: makeAjaxRequest
                }]
            },{
                id: 'status',
                xtype: 'toolbar',
                dock: 'bottom',
                title: "Tap a button above."
            }]
        });
    }
});