Remove 'Add Existing...' button from associated view entities form

I was found this code at Dave Hawes blog — http://blog.davehawes.com/post/2008/04/23/MSCRM-4-Remove-Add-Existing-xxxxx-button.aspx
This code should be added to onLoad event for the form of the entity where you want to hide buttons for the associated views of other entities.

HideAssociatedViewButtons('new_account_new_accountclassificate', ['Добавить к этой записи существующий объект Классификация организации']);  
 
function HideAssociatedViewButtons(loadAreaId, buttonTitles){
    var navElement = document.getElementById('nav_' + loadAreaId); 
   if (navElement != null)    {
        navElement.onclick = function LoadAreaOverride()        {
            loadArea(loadAreaId);
            HideViewButtons(document.getElementById(loadAreaId + 'Frame'), buttonTitles);
        }
    }
}
 
function HideViewButtons(Iframe, buttonTitles) { 
    if (Iframe != null ) {
        Iframe.onreadystatechange = function HideTitledButtons() { 
            if (Iframe.readyState == 'complete') { 
                var iFrame = frames[window.event.srcElement.id]; 
                var liElements = iFrame.document.getElementsByTagName('li'); 
 
                for (var j = 0; j < buttonTitles.length; j++) { 
                    for (var i = 0; i < liElements.length; i++) { 
                        if (liElements[i].getAttribute('title') == buttonTitles[j]) { 
                            liElements[i].style.display = 'none'; 
                            break; 
                        }
                    } 
                } 
            } 
        } 
    }
} 

Publishing it here for memory.