function checkey(e)
{
var k;
k=e.keyCode;
if(k==9||k==16||k==17||k==18)
return true;
return false;
}
function log10(dato){return Math.LOG10E*Math.log(dato);}
function todbm(mw){return 10*log10 (mw);}
function tomw(dbm){return Math.pow(10,dbm/10);}
function mwtodbm(e){if (checkey(e))return; popo.valout.value = todbm(popo.valinp.value);}
function dbmtomw(e){if (checkey(e))return; popo.valinp.value = tomw(popo.valout.value);}
function ctable(nome) {
var iniz;var fin;var passo;
iniz=parseFloat(elen.valiniz.value);
fin= parseFloat( nome.valfine.value);
passo=Math.abs(parseFloat(nome.valpasso.value));
mywnd=window.open("","","status=1,scrollbars=1,resizable=1,width=390,height=450,screenX=1,screenY=1");
mywnd.document.write(""dBm mW table"");
mywnd.document.write('Stampa questa');
mywnd.document.write("
Tabella di conversione tra dBm e mW
");
mywnd.document.write("creata da www.bbaba.altervista.org");
mywnd.document.write("");
for (i=iniz; i<=fin; i+=passo){scriviriga();}
for (i=iniz; i>=fin; i-=passo){scriviriga();}
mywnd.document.write("
");
mywnd.document.write("Table created by www.bbaba.altervista.org");
//mywnd.document.write("");
//mywnd.document.write("");
//mywnd.document.write("");
mywnd.document.write("");
mywnd.document.close();}
function scriviriga(){
mywnd.document.write("| ");
mywnd.document.write(i+"dBm"+" | "+tomw(i)+" mW |
");
}