Sys.Application.add_init(AppInit);

function AppInit(sender) {
    Sys.WebForms.PageRequestManager.getInstance().add_pageLoaded(End);
}

function End(sender, args) {
    var checker = document.getElementById('ctl00_ItemAdderCPH_PUBoxesPUB_HiddenAction');
    if (checker != null) {
        displayPopUp(); 
    }
    var checker = document.getElementById('ctl00_ItemAdderCPH_ItemAdderUC1_HiddenAction');
    if (checker != null) {
        displayAddItem();
    }
}