if (self.name==top.name) 
{ 
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document.write('<FRAME NAME="sopra" SRC="mc.htm" MARGINHEIGHT=0 MARGINWIDTH=0 SCROLLING=NO NORESIZE>')
document.write('<FRAME NAME="mezzo" src='+document.location.href+'?a MARGINHEIGHT=0 MARGINWIDTH=0 SCROLLING=AUTO NORESIZE>')
document.write('<FRAME NAME="sotto" SRC="mi.htm" MARGINHEIGHT=0 MARGINWIDTH=0 SCROLLING=NO NORESIZE>')
document.write('</frameset>')
}