I have a page login.aspx, it has a link <a href= "webfolder/abc.aspx"

on click it opens properly but when i open another link which is on abc.aspx,

link <a href = "webfolder/abc1.aspx"> this one does not opens instead.

it copies webfolder/webfoldertwoice.

i wanted to understand the process, because i tried windows.location and equivalent but they all behaved  in then same way.