(function ($) {
$(function () {
$("#datepicker").datepicker({ dateFormat: 'yy-mm-dd' } );
$("#timepicker").timepicker({
timeFormat: 'HH:mm:ss'
});
$("#datepickerto").datepicker({ dateFormat: 'yy-mm-dd' });
$("#timepickerTo").timepicker({
timeFormat: 'HH:mm:ss'
});
});
})(jQuery);
targetList = list.getByTitle('AppbokningarList');
var frDate = new Date(result);
var tDate = new Date(result2);
var camlQuery = new SP.CamlQuery(),
collListItem, strViewXml;
strViewXml = "<View><Query><OrderBy><FieldRef Name='EventDate'/></OrderBy><Where><And><Lt><FieldRef Name='EndDate'/>";
strViewXml += "<Value Type='DateTime'>" + frDate.toISOString + "</Value></Lt><Gt><FieldRef Name='EventDate'/>";
strViewXml += "<Value Type='DateTime'>" + tDate.toISOString + "</Value></Gt></And></Where></Query></View>";
camlQuery.set_viewXml(strViewXml);
collListItem = targetList.getItems(camlQuery);
context.load(collListItem);
UPDATE
var result = listItemCustom + "T" + "" + listItemFromTime + ":00" + ":000" + "Z";
newItem.set_item('EventDate', result);
var result2 = listItemtoDate + "T" + "" + listItemToTime + ":00" + ":000" + "Z";
newItem.set_item('EndDate', result2);