var prm = Sys.WebForms.PageRequestManager.getInstance();
    if (prm) {
		prm.add_initializeRequest(InitializeRequest);
        prm.add_endRequest(EndRequest);
        }

    function InitializeRequest(sender, args){
        var oElement = document.getElementById('divPageContainer');
        /* if (oElement)*/oElement.style.cursor = 'wait';
        var img_loader = document.getElementById('img_loader');
        if (img_loader != null) {
            img_loader.style.display = 'block';
        }
        
    }

    function EndRequest(sender, args){
        var oElement = document.getElementById('divPageContainer'); 
       /* if (oElement)*/ oElement.style.cursor = 'auto';
        var img_loader = document.getElementById('img_loader');
        if (img_loader != null) {
            img_loader.style.display = 'none';
        }
    }