Passing Credentials to SAP GUI for HTML

Hell All,

We have developed java application in which we need to open SAP GUI for HTML with the help of one key. For the same i have configured ITS and i can able to open the SAP GUI in the browser with the help of following link

[http://<ServerName>:8000/sap/bc/gui/sap/its/webgui?~transaction=*vd02%20RF02D-KUNNR=255]

But while accessing this link it is asking me the credentials of the ECC system. We need ti bypass this step. i.e. when user clicks on link , it should show the after log on screen.

Is there any method to pass the user name and password with the java code or any other method?? Any help??

Thanks

Prashant