Passing the log-on credentials in the URL

Hi all,

http://servername/businessobjects/enterprise115/sap/InfoView/scripts/openDocument.aspx?sDocName=

This is the format of the URL of my Crystal report that was published in SAP Enterprise portal.

I wanted to pass the SAP BW credentials along with the URL, so that on opening the URL I will not be asked for any log on details and it directly opens the Crystal report.

Kindly help me on this issue..

Thanks

Eswari.B