Open your internet browser (open Internet Explorer 6). Click "Tools" at the menu bar and select "Internet Options".
Under Temporary Internet Files, click "Delete Cookies". After cookies are deleted, click "Delete Files".
After all cookies and files are deleted, click "OK". Restart Internet Explorer for the changes to take effect.
Open your internet browser (open Internet Explorer 7). Click "Tools" at the menu bar and select "Delete Browsing History". 
Go to Cookies and click "Delete Cookies". A "Delete Cookies" window will appear.
Click "Yes".
Click "Close". Restart Internet Explorer and sign in to My Alibaba again.
Open your internet browser (open Internet Explorer 8). Click "Tools" and select "Delete Browsing History". 
A window will appear. Select "Cookies"
Click the "Delete" button
Restart Internet Explorer and sign in to My Alibaba again.
Open your internet browser (open Firefox 3.5). Click "Tools" at the menu bar and select "Clear Recent History".
A pop out window will appear. Select "Everything" from the drop down menu.
Click "Details" and select "Cookies" from the menu. 
Then click "Clear Now". 
After all cookies are deleted, restart Firefox for the changes to take effect.