Amazon Associates add-to-cart button, specify merchant

[dembuonvn]

It is possiblt to use an Amazon add-to-cart button to your own website, specifying the product you wish to add to cart, but does anyone know if it is at all possible to specify the merchant that is used? So if there is three merchant sellers on amazon selling the same product, how do I specify that I want to use a specific one?\[code\]<form method="POST" action="http://www.amazon.com/o/dt/assoc/&return;handle-buy-box=insert ASIN"><input type=hidden name="exchange.insert exchange ID.insert ASIN.insert Seller ID" value="http://stackoverflow.com/questions/8136404/1"><input type="hidden" name="tag-value" value="http://stackoverflow.com/questions/8136404/insert affiliate tag"><input type="hidden" name="tag_value" value="http://stackoverflow.com/questions/8136404/insert affiliate tag"><input type="submit" name="submit.add-to-cart" value="http://stackoverflow.com/questions/8136404/Buy From Amazon.com"></form>\[/code\]