Jquery Auto complete plugin

$("#txtSearch").autocomplete("/test/searchitembyCode",{ matchCase: false ,
parse: prep_data,
formatItem: function(item) {
return item.Title;
}
}).result(function(event, item) {
alert(item.Id);
});



// Handle data from ajax request
prep_data = function(data){
tmp = eval('(' + data + ')');
parsed_data = [];
for (i=0; i < tmp.length; i++) {
obj = tmp[i];
// Other internal autocomplete operations expect
// the data to be split into associative arrays of this sort
parsed_data[i] = {
data: obj ,
value: obj.Id,
result: obj.Title
};
}
return parsed_data
}