return page after a web link

Hi,

What should be the syntax of my url so that I can jump directly to the opportunity creation page from the account page (with a parameter which is the account id) AND so that I can come back to the opportunity page?

My URL syntax is the following but if I click on it and add new products to my opportunity at the end when I click save it takes me back to the account page and not the opportunity page.

https://secure-ausomxXXX.crmondemand.com/OnDemand/user/OpptyCreateNewPageDefault?OMTGT=OpptyCreateEditForm&OMTHD=OpportunityNewNav&OMRETO=OpportunityHomePage&0pptyCreateEditForm.Account=%%%Account%%%&0pptyCreateEditForm.Accountld=%%%Row_Id%%%