MS CRM 2013 Move MS CRM Scroll to Top is not working in Chrome and Firefox?

Hi,

We have a custom web application Inside an Iframe. Whenever there is an error we are moving the MS CRM Scroll bar to top using below code.

window.parent.document.getElementById('tdAreas').scrollTop = 0;

but its failing in Chrome and Firefox.

If I put below code.In chrome it alerts an object.But it is not able to get any Element inside that.

alert(window.parent) 

 Please suggest.

Thanks

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