//-- Pi and Tee Models
function pitee2(){
	userin=document.attnmodel.Attn.value;
	if (userin == 0){
		userin=3.0;
		document.attnmodel.Attn.value=userin;
	}
	Attnval=eval(userin);
	if (Attnval<0){
		Attnval=-Attnval;
	}

	voltloss = Math.pow(10.0,Attnval/20.0);
	magloss = Math.pow(10.0,Attnval/10.0);
	ra = (voltloss-1)/(voltloss+1);
	rb = 2.0*voltloss/(magloss-1);
	Ra_Tee_val = (Math.round(ra*5000))/100;
	Rb_Tee_val = (Math.round(rb*5000))/100;
	Ra_Pi_val = (Math.round(5000/ra))/100;
	Rb_Pi_val = (Math.round(5000/rb))/100;
	document.attnmodel.Ra_Tee.value=Ra_Tee_val;
	document.attnmodel.Rb_Tee.value=Rb_Tee_val;
	document.attnmodel.Ra_Pi.value=Ra_Pi_val;
	document.attnmodel.Rb_Pi.value=Rb_Pi_val;
}