AJAX

<input type="button" id="runButton" value="Run" onclick="click_on()"/>
<input type="button" id="stopButton" value="Stop" onclick="click_off()"/>
	
<script type="text/javascript">
	
function click_on() {
    var statusPanel = $find(<% = "\"" + StatusPanel1.ClientID + "\"" %>);
    statusPanel.set_busyState($get("runButton"), true);
    return false;
}
	
function click_off() {
    var statusPanel = $find(<% = "\"" + StatusPanel1.ClientID + "\"" %>);
    statusPanel.set_busyState($get("runButton"), false);
    return false;
}
	
Sys.Application.add_load(function(e, t) {
	
    if (t.get_isPartialLoad()) return;
		
    var statusPanel = $find(<% = "\"" + StatusPanel1.ClientID + "\"" %>);

    statusPanel.objects = new Array();
	
    statusPanel._onStatusChanged = function() {
        var bv = $find(this._bitmapViewerId);
        statusPanel.set_busyState(bv, bv.get_status() == GraphicsMill.UpdateStatus.busy);
    }
	
    statusPanel.set_busyState = function(obj, state) {
        var statusPanel = $find(<% = "\"" + StatusPanel1.ClientID + "\"" %>);
			
	// Add a little method for setting status css class.
        statusPanel._setState = function(state) {
            this.get_element().className = state ? "StatusPanelBusy" : "StatusPanel";
        }
			
        // Add array.
        if (!statusPanel.objects) {
            statusPanel.objects = new Array();
        }
			
        if (state) {
            for (var i = 0; i < statusPanel.objects.length; i++) {
                if (statusPanel.objects[i] == obj) {
                    return;
                }
            }
            Array.add(statusPanel.objects, obj);
            statusPanel._setState(true);
        }
        else {
            Array.remove(statusPanel.objects, obj);
            statusPanel._setState(statusPanel.objects.length != 0);
        }
    }
});
</script>

	Sys.WebForms.PageRequestManager.getInstance().add_beginRequest(function(){
	//	EndBusyState();
		alert("begin request");
	});
	Sys.WebForms.PageRequestManager.getInstance().add_endRequest(function(){
	//	EndBusyState();
		alert("end request");
	});
	Sys.WebForms.PageRequestManager.getInstance().add_pageLoading(function(){
	//	EndBusyState();
		alert("page loading");
	});
	Sys.WebForms.PageRequestManager.getInstance().add_pageLoaded(function(){
	//	EndBusyState();
		alert("page loaded");
	});