Javascript for ProcessBar

<asp:ScriptManager ID="ScriptManager1" runat="server">
        </asp:ScriptManager>

        <script language="javascript" type="text/javascript">
        var prm = Sys.WebForms.PageRequestManager.getInstance();
        prm.add_pageLoaded(pageLoaded);
        prm.add_initializeRequest(initializeRequest);
        prm.add_endRequest(endRequest);
        function initializeRequest(sender, eventArgs)
        {
            ShowValidationInfo();
        }
        function pageLoaded(sender, eventArgs)
        {

        }
        function endRequest(sender, endRequestEventArgs)
        {
            HideValidationInfo();
        }


    </script>

function CreateDivSections()
{
    var myWidth = document.body.clientWidth;
    var myHeight = document.body.clientHeight;

    var dvDisable = document.createElement('div');
    dvDisable.id = 'dvDisable';
    dvDisable.className = 'clsDisablePage';
    document.body.appendChild(dvDisable);
    dvDisable.style.width = myWidth+15;
    dvDisable.style.height = myHeight+20;

    var dvLayer = document.createElement('div');
    dvLayer.id = 'dvLayer';
    dvLayer.className = 'clsWaitPage';
    document.body.appendChild(dvLayer);
    dvLayer.style.left = (myWidth - dvLayer.style.width) / 2 ;
    dvLayer.style.top = (myHeight - dvLayer.style.height) / 2 ;
}


        function ShowValidationInfo()
        {
            CreateDivSections();
            document.getElementById('dvDisable').style.visibility = 'visible';
            document.getElementById('dvLayer').style.visibility = 'visible';
        }
        function HideValidationInfo()
        {
            CreateDivSections();
            document.getElementById('dvDisable').style.visibility =  'hidden';
            document.getElementById('dvLayer').style.visibility =  'hidden';
        }

.clsWaitPage
{
    visibility:hidden;
    border-left: solid 1px gray;
    border-right: solid 1px gray;
    border-top: solid 1px gray;
    border-bottom: solid 1px gray;
    font-family: Book Antiqua;
    font-weight:bold;
    font-size: 12pt;
    padding-left: 0px;
    padding-right: 0px;
    z-index: 1002;
    background: white;
    background-image:url(wait.gif);
    overflow: hidden;
    position: absolute;
    padding-bottom: 0px;
    margin: 0px;
    padding-top: 0px;
    height: 100px;
    width: 100px;
}