<!--

function solve(form){

if (form.metric.value==1){

	P  = 0.25;
	d  = 1;
	d2 = 0.838;
	d3 = 0.693}

else if (form.metric.value==1.2){

	P  = 0.25;
	d  = 1.2;
	d2 = 1.038;
	d3 = 0.893}

else if (form.metric.value==1.6){

	P  = 0.35;
	d  = 1.6;
	d2 = 1.373;
	d3 = 1.17}

else if (form.metric.value==2){

	P  = 0.4;
	d  = 2;
	d2 = 1.74;
	d3 = 1.509}

else if (form.metric.value==3){

	P  = 0.5;
	d  = 3;
	d2 = 2.675;
	d3 = 2.387}

else if (form.metric.value==4){

	P  = 0.7;
	d  = 4;
	d2 = 3.545;
	d3 = 3.141}

else if (form.metric.value==5){

	P  = 0.8;
	d  = 5;
	d2 = 4.48;
	d3 = 4.019}

else if (form.metric.value==6){

	P  = 1.0;
	d  = 6;
	d2 = 5.35;
	d3 = 4.773}
	
else if (form.metric.value==8){

	P  = 1.25;
	d  = 8;
	d2 = 7.188;
	d3 = 6.466}

else if (form.metric.value==10){

	P  = 1.5;
	d  = 10;
	d2 = 9.026;
	d3 = 8.160}

else if (form.metric.value==12){

	P  = 1.75;
	d  = 12;
	d2 = 10.863;
	d3 = 9.853}
   
else if (form.metric.value==14){

	P  = 2;
	d  = 14;
	d2 = 12.701;
	d3 = 11.546}

else if (form.metric.value==16){

	P  = 2;
	d  = 16;
	d2 = 14.701;
	d3 = 13.546}

else if (form.metric.value==20){

	P  = 2.5;
	d  = 20;
	d2 = 18.376;
	d3 = 16.933}

else if (form.metric.value==24){

	P  = 3;
	d  = 24;
	d2 = 22.051;
	d3 = 20.319}

else if (form.metric.value==30){

	P  = 3.5;
	d  = 30;
	d2 = 27.727;
	d3 = 25.706}

else if (form.metric.value==36){

	P  = 4.0;
	d  = 36;
	d2 = 33.402;
	d3 = 31.093}
	
else if (form.metric.value==42){

	P  = 4.5;
	d  = 42;
	d2 = 39.077;
	d3 = 36.479}

Le  = form.Le.value;
tau  = form.tau.value;

d0=(d2+d3)/2;
At = Math.PI*d0*d0/4;
Ath = 0.5*3.1426*d0*Le;
F = Ath*tau;
sigma = F/At;

form.d0.value  = Math.round(d0*10)/10;
form.At.value  = Math.round(At*100)/100;
form.Ath.value  = Math.round(Ath*100)/100;
form.F.value = Math.round(F*Math.pow(10,-3)*100)/100;
form.sigma.value  = Math.round(sigma*100)/100;
}

function reset(form) 
{
form.d0.value = "";
form.At.value = "";

form.Ath.value = "";
form.Fs.value = "";
}
// -->