Process image in asp.net on Button Click

var prm = Sys.WebForms.PageRequestManager.getInstance();

prm.add_initializeRequest(InitializeRequest);

prm.add_endRequest(EndRequest);

var postBackElement;

function InitializeRequest(sender, args) {

if (prm.get_isInAsyncPostBack())

args.set_cancel(true);

postBackElement = args.get_postBackElement();

if (postBackElement.id == 'Inventory_MainContent_btn_Save') {

$get('Inventory_MainContent_UpdateProgress1').style.display = 'block';

$get('Inventory_MainContent_btn_Save').disabled = true;

}

}

function EndRequest(sender, args) {

if (postBackElement.id == 'Inventory_MainContent_btn_Save') {

$get('Inventory_MainContent_UpdateProgress1').style.display = 'none';

$get('Inventory_MainContent_btn_Save').disabled = false;

}

}

Please Wait...