Automatic validation of an entry in people/group using jquery

<script language="javascript" type="text/javascript" src="/SiteAssets/jQueryLibrary/jquery-1.6.min.js"></script>
<script language="javascript" type="text/javascript" src="/SiteAssets/jQueryLibrary/jquery.SPServices-0.7.2.min.js"></script>
<script language="javascript" type="text/javascript">
var sText;

$(document).ready(function () {

$("select[title$='Store Name']").change(function () {


sText = $("select[title$='Store Name'] option:selected").text();

search();





});
});

function search(){
var context = new SP.ClientContext.get_current();
var web = context.get_web();
var list = web.get_lists().getByTitle('Store Details');
var query = '<view> <query><where><eq><fieldref name="\'Title\'/"><value type="\'Text\'">' + sText + '';
var camlQuery = new SP.CamlQuery();
camlQuery.set_viewXml(query);
this.collListItems = list.getItems(camlQuery);
context.load(this.collListItems);
context.executeQueryAsync(Function.createDelegate(this, this.onSuccess), Function.createDelegate(this, this.onFail));
}

function onSuccess(){
var listEnumerator=this.collListItems.getEnumerator();
while (listEnumerator.moveNext())
{
var item = listEnumerator.get_current();

$("input[title$='Region Name']").val(item.get_item('Region_x0020_Name'));
$("input[title$='District Name']").val(item.get_item('District_x0020_Name'));
$("input[title$='Region Name']").attr("disabled", "disabled");
$("input[title$='District Name']").attr("disabled", "disabled");
$("input[title$='District Manager']").val(item.get_item('District_x0020_Manager').get_lookupValue());
$("input[title$='Store Manager']").val(item.get_item('Store_x0020_Manager').get_lookupValue());
$("input[title$='Region Manager']").val(item.get_item('Region_x0020_Manager').get_lookupValue());
$("input[title$='Company Manager']").val(item.get_item('Company_x0020_Manager'));
$("input[title$='Store ManagerOld']").val(item.get_item('Store_x0020_Manager').get_lookupValue());
$("input[title$='District ManagerOld']").val(item.get_item('District_x0020_Manager').get_lookupValue());
$("input[title$='Company ManagerOld']").val(item.get_item('Company_x0020_Manager').get_lookupValue());
$("input[title$='Region Manager1']").val(item.get_item('Region_x0020_Manager').get_lookupValue()); }


}

function onFail(){
alert('');
}
</script>