//  Calculo de Alto-Falante (22/07/05)
//  http://www.mdarc.net

function paralelo1(obj) {
with (Math) {
rs1=(obj.r1.value);
rs2=(obj.r2.value);
if (!rs1) return;
if (!rs2) return;

req1=1/rs1
req2=1/rs2
c6=req1+req2
d6=1/c6

obj.equivalente.value=d6;


 }
}