function popup(URL,widt,heigh) {
	window.open(URL, '','toolbar=no,menubar=no,scrollbars=yes,resizable=yes,width='+widt+',height='+heigh+',top=800,left=600');
}

function enlarge(form1,what,how,how_much){
	if(how=='height'){
		document.forms[''+form1+''].elements[''+what+''].height=how_much;
	}
}



function RandomNumber() 
{
  var today = new Date();
  var num= Math.abs(Math.sin(today.getTime()/1000));
  return num;
}

function RandomGraphics() 
{
  var x = RandomNumber();

  if (x > .77) 
{document.write("<A HREF='http://www.html.it/'><img src='banners/1.jpg' align=center hspace=10 border=0 alt='Testo prova' width='140'></a>"); return; 
}
  if (x > .66) 
{document.write("<A HREF='http://www.html.it/'><img src='banners/2.jpg' align=center hspace=10 border=0 alt='HTML.it' width='140'></a>"); return; 
}
  if (x > .55) 
{document.write("<A HREF='http://www.html.it/'><img src='banners/3.jpg' align=center hspace=10 border=0 alt='Lorem ipsum' width='140'></a>"); return; 
}
  if (x > .44) 
{document.write("<A HREF='http://www.html.it/'><img src='banners/4.jpg' align=center hspace=10 border=0 alt='Fai pubblicità su questo sito' width='140'></a>"); return; 
}
  if (x > .33) 
{document.write("<A HREF='http://www.html.it/'><img src='banners/5.jpg' align=center hspace=10 border=0 alt='True Type font' width='140'></a>"); return; 
}
  if (x > .22) 
{document.write("<A HREF='http://www.html.it/'><img src='banners/6.jpg' align=center hspace=10 border=0 alt='HTML.it' width='140'></a>"); return; 
}
  if (x > .11) 
{document.write("<A HREF='http://www.html.it'><img src='banners/1.jpg' align=center hspace=10 border=0 alt='Ciao' width='140'></a>"); return; 
}
  if (x > 0)   
{document.write("<A HREF='http://www.html.it/'><img src='banners/3.jpg' align=center hspace=10 border=0 alt='Pubblicità su questo sito' width='140'></a>"); return; 
}
}