$(document).ready(function () {

     var availableTags = [

"India",

"United States",

"Qatar"

]

$( "#tags" ).autocomplete({

    source: availableTags,

    select: function( event, ui ) {

        $( "#version" ).val('');

        //alert(ui.item.value);

        var selected_val = ui.item.value;        

        if(selected_val == "India")

        {

 var states: [

"Tamil Nadu",

"Karnataka",

"Kerala"

];

}

        else if(selected_val == "United States")

        {

            $( "#version" ).autocomplete({

                source: ['Texas' ,'California']

            });

        } 

        else if(selected_val == "Qatar")

        {

            $( "#version" ).autocomplete({

                source: ['Doha' ,'Doha Corniche']

            });

        } 

    }    

});

this is the sample autocomplete for two forms but looking for further development with four field. i want it to be with Purely jQuery. no ajax no php. i want it extend it further for Four Feild this works fine for two Feild.