function cpscalc(myform)
{
var bytes = 0
var trans = 0 
bytes = myform.dimensione.value * ( ( (myform.unita.options[0].selected == true)*1024) + ( (myform.unita.options[1].selected == true) *1024*1024) + ( (myform.unita.options[2].selected == true) * 1024*1024*1024) )
trans = myform.velocita.value /   ( ( (myform.unitaV.options[0].selected == true) * 8/1000) + ( (myform.unitaV.options[1].selected == true) *8/1000/1000) )
myform.result.value = getmin(Math.round(bytes/trans))
myform.tasat.value = (trans / 1000) + "  KB/s"
}

function getmin(sec)
{
	var ore = 0
	var minuti = 0
    var secondi = 0
	var tempo = " "
	if(sec<1) return ("Menos de 1 segundo")
	ore = Math.floor (sec/3600)
	minuti =  Math.floor((sec - (ore*3600))/60)
	secondi = Math.floor (sec - ((ore*3600) + (minuti * 60)))
   if(sec > 86400) return ("Más de 1 dia")
   else if(sec >=  3600) tempo = ore + "h   " + minuti + "m   " + secondi + "s"
  	else if( sec< 3600 & sec >=60) tempo = minuti + "m   " + secondi + "s"
	else tempo = secondi + "s"
	return(tempo)
}