how to create properties file with ExtJS, like .properties in j2ee app?

how to create properties file with ExtJS, like .properties in java?
I mean any alternative way? example?


for example
I need to keep following text in some JSP file

Code:

---

_properties = {
        "myapp.hello": "Hello World",
        "myapp.name": "My Application"
}

---

and from JS file I need to access like

Code:

---

Ext.MessageBox.alert(_properties["myapp.name"], _properties["myapp.hello"]);

---

anybody?