ExtJS 2.1 and Java Demo - ExtJS Ajax Communication Best Practices

[buntyindia]

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Hi,

I have following code

 loadDataStores:function(){
                //Search         
            searchDataStore = new Ext.data.Store({
                proxy: new Ext.data.HttpProxy({url:'Utility.htm'}),
                reader: new Ext.data.JsonReader({
.......
} 

How to apply requestexception code here. Please help