Try this code (for Firefox):

print "<A HREF=\"file:///C:/Documents%20and%20Settings/mqa/scr/tcl/out
+putFile\">Click Here To View Output</A>";
[download]

or this (for Opera):

print "<A HREF=\"file://localhost/C:/Documents%20and%20Settings/mqa/sc
+r/tcl/outputFile\">Click Here To View Output</A>";
[download]

But as said before browsers don't allow to open local files to sites. Unless this website is in Local security zone.