After some researches, my friend posted a review for some Js frameworks (JavaScript UI framework comparison or Why I choose ExtJS & JQuery) we started to write out project mainly on ExtJs. So the first thing that needed very much and couldn’t find anywhere was the simplest combobox which default value I would gave from XML. At the process I found that Ext.data.XmlStore doesn’t have any parameter which shows is it loaded already or not. So the first I’ve extended it for my needs. Continue reading »