var usewgt;
var last;
var nlast;

//     *************************salt****************
function saltgc(g,p,per)
{
if (last!=1) {
	nlast=last;
	last=1;}
l=g*3.785;
	x=l.toFixed(3);
	if (isNaN(x)) {x=0;}
	document.forms.salt.saltl.value=x;

if (nlast==2) 
	{
	// per
	y=p / (g * .083453);
	x=y.toFixed(3);
	if (isNaN(x)) {x=0;}
	document.forms.salt.saltper.value=x;
	}
else
	{
	// wgt
	y=(g * .083453) * per;
	x=y.toFixed(3);
	if (isNaN(x)) {x=0;}
	document.forms.salt.saltp.value=x;
	x=(y*16).toFixed(3);
	if (isNaN(x)) {x=0;}
	document.forms.salt.salto.value=x;
	x=(y*453.6).toFixed(3);
	if (isNaN(x)) {x=0;}
	document.forms.salt.saltgr.value=x;
	}
}
function saltlc(l,p,per)
{
if (last!=1) {
	nlast=last;
	last=1;}
g=l/3.785;
	x=g.toFixed(3);
	if (isNaN(x)) {x=0;}
	document.forms.salt.saltg.value=x;

if (nlast==2) 
	{
	// per
	y=p / (g * .083453);
	x=y.toFixed(3);
	if (isNaN(x)) {x=0;}
	document.forms.salt.saltper.value=x;
	}
else
	{
	// wgt
	y=(g * .083453) * per;
	x=y.toFixed(3);
	if (isNaN(x)) {x=0;}
	document.forms.salt.saltp.value=x;
	x=(y*16).toFixed(3);
	if (isNaN(x)) {x=0;}
	document.forms.salt.salto.value=x;
	x=(y*453.6).toFixed(3);
	if (isNaN(x)) {x=0;}
	document.forms.salt.saltgr.value=x;
	}
}

function saltpc(g,p,per,t)
{
if (last!=2) {
	nlast=last;
	last=2;}
if (t==1) {y=p*16;}
if (t==2) {y=p*1;}
if (t==3) {y=p/28.35;}
p=y/16;
	x=p.toFixed(3);
	if (isNaN(x)) {x=0;}
	if (t!=1) {document.forms.salt.saltp.value=x;}
	x=y.toFixed(3);
	if (isNaN(x)) {x=0;}
	if (t!=2) {document.forms.salt.salto.value=x;}
	x=(y*28.35).toFixed(3);
	if (isNaN(x)) {x=0;}
	if (t!=3) {document.forms.salt.saltgr.value=x;}
if (nlast==1) 
	{
	// per
	y=p / (g * .083453);
	x=y.toFixed(3);
	if (isNaN(x)) {x=0;}
	document.forms.salt.saltper.value=x;
	}
else
	{
	// gal
	y=p / (per * .083453);
	x=y.toFixed(3);
	if (isNaN(x)) {x=0;}
	document.forms.salt.saltg.value=x;
	y=y*3.785;
	x=y.toFixed(3);
	if (isNaN(x)) {x=0;}
	document.forms.salt.saltl.value=x;
	}
}

function saltperc(g,p,per)
{
if (last!=3) {
	nlast=last;
	last=3;}
if (g==0 && p==0) {alert("Enter either Gallons or Pounds")}
if (g==0 || nlast==2) 
	{
	// gal
	y=p / (per * .083453);
	x=y.toFixed(3);
	if (isNaN(x)) {x=0;}
	document.forms.salt.saltg.value=x;
	y=y*3.785;
	x=y.toFixed(3);
	if (isNaN(x)) {x=0;}
	document.forms.salt.saltl.value=x;

	}
else	
	{
	// wgt
	y=(g * .083453) * per;
	x=y.toFixed(3);
	if (isNaN(x)) {x=0;}
	document.forms.salt.saltp.value=x;
	x=(y*16).toFixed(3);
	if (isNaN(x)) {x=0;}
	document.forms.salt.salto.value=x;
	x=(y*453.6).toFixed(3);
	if (isNaN(x)) {x=0;}
	document.forms.salt.saltgr.value=x;
	}
}