New Post: Get list item count for a week

$(document).ready() {

    var itemCount;
    var daysFromSunday = (new Date()).getDay(),
        dateOffset = (
            daysFromSunday > 0 ? " OffsetDays='-" + daysFromSunday + "'" : ""
        ),
        query;
    var daysToSunday = 7 - daysFromSunday;

    var query = "<Query>" +
        "<Where>" +
        "<And>" +
        "<Geq>" +
        "<FieldRef Name='CreateDate' />" +
        "<Value Type='DateTime'>" +
        "<Today OffsetDays='-" + daysFromSunday + "'/>" +
        "</Value>" +
        "</Geq>" +
        "<Leq>" +
        "<FieldRef Name='CreateDate' />" +
        "<Value Type='DateTime'>" +
        "<Today OffsetDays='" + daysToSunday + "'/>" +
        "</Value>" +
        "</Leq>" +
        "</And>" +
        "</Where>" +
        "</Query>";

    $().SPServices({
        operation: "GetListItems",
        listName: "Opportunities",
        async: false,
        completefunc: function(xData, Status) {
            itemCount = $(xData.responseXML).SPFilterNode("rs:data").attr("ItemCount");
        }
    });
    alert(itemCount);
});