Miscellany

var conn = new Ext.data.Connection();conn.request({    url: url,    method: "POST",    params: params,    defaultHeaders: { "Content-Type": "text/html" },    success: function(response) {        var data = response.responseText;        try { data = eval("(" + response.responseText + ")"); } catch (e) { }        success(data);    },    failure: function(response) {        Ext.Msg.alert("Error", "Failure retrieving data (" + url + ")");    }});