<script type="text/javascript">
    $(document).ready(function() {
        var soapEnv =
            "<soapenv:Envelope xmlns:soapenv='http://schemas.xmlsoap.org/soap/envelope/'>
                <soapenv:Body>
                     <GetListItems xmlns='http://schemas.microsoft.com/sharepoint/soap/'>
                        <listName>Posts</listName>
                        <viewName>{B9212691-1AF1-41AF-9DA7-6073ADDB091B}</viewName>
                    <View>
                        <Query>
                                 <OrderBy>
                                <FieldRef Name='ID' Ascending='False' />
                             </OrderBy>
                        </Query>
                    <RowLimit>1</RowLimit>
                    </View>
                    </GetListItems>
                </soapenv:Body>
            </soapenv:Envelope>";

        $.ajax({
            url: "_vti_bin/lists.asmx",
            type: "POST",
            dataType: "xml",
            data: soapEnv,
            complete: processResult,
            contentType: "text/xml; charset="utf-8""
        });
    });


    function processResult(xData, status) {
        $(xData.responseXML).find("z\:row").each(function() {
            var liHtml = "<li>" + $(this).attr("ows_ID") + "</li>";
            $("#tasksUL").append(liHtml);
        });
    }


</script>

<ul id="tasksUL"/>

$(xData.responseXML).find("[nodeName='z:row']").each(function()

$(document).ready(function() {

    var idquery="";
    $().SPServices({
     operation: "GetListItems",
    async: false,
    listName: "test",
    CAMLQuery: idquery,
    CAMLRowLimit: 1,
    completefunc: function (xData, Status)
    {
    $(xData.responseXML).SPFilterNode("z:row").each(function() { //alert($(this).attr("ows_Title"));
    var getvalue= parseInt($(this).attr("ows_Title"))+1;//Auto increment value $("input[title='TicketNumber']").val(getvalue);

            });
         }
        });