I have to place a link in Logon page and map another custom jsp to the link. Where should i place the link and what should i given in href i.e. path of jsp to display my page.
for adding a jsp link to the logon page of the portal u have to customize the portal logon page.
to do that you ned to modify the logon par file, sap.portal.runtime.logn.par.
you can download the backup file for the same from usrsap<instance>jc00j2eeclusterserver0appssap.comirjservlet_jspirj ootWEB-INFdeploymentpcd
cpy it to ur system and rename the file to refect yur comany namespace like, com.satyam.logon.par.
now you can modify the par file using either using eclips PDK plugins or winZIP.
make the changes and deploy to the portal. and set it as uyour logon page.
For detail process follow the link:
please give points if it helps you.