function date (form){
var Serial=form.inputbox.value;
if(Serial<=0)
	{Message="That was an invalid serial number";Year="";}
else{Message="Your Winchester Single Shot Model was manufactured in ";
if(Serial<=375)
	{Year=1885;}
else{
if(Serial<=6841)
	{Year=1886;}
else{
if(Serial<=18328)
	{Year=1887;}
else{
if(Serial<=30571)
	{Year=1888;}
else{
if(Serial<=45019)
	{Year=1889;}
else{
if(Serial<=53700)
	{Year="1890 or 1891";}
else{
if(Serial<=60371)
	{Year=1892;}
else{
if(Serial<=69534)
	{Year=1893;}
else{
if(Serial<=73771)
	{Year="1894 or 1895";}
else{
if(Serial<=78253)
	{Year=1896;}
else{
if(Serial<=78815)
	{Year=1897;}
else{
if(Serial<=84700)
	{Year=1898;}
else{
if(Serial<=85086)
	{Year=1899;}
else{
if(Serial<=88501)
	{Year=1900;}
else{
if(Serial<=90424)
	{Year=1901;}
else{
if(Serial<=92031)
	{Year=1902;}
else{
if(Serial<=92359)
	{Year=1903;}
else{
if(Serial<=92785)
	{Year=1904;}
else{
if(Serial<=93611)
	{Year=1905;}
else{
if(Serial<=94208)
	{Year=1906;}
else{
if(Serial<=95743)
	{Year=1907;}
else{
if(Serial<=96819)
	{Year=1908;}
else{
if(Serial<=98097)
	{Year=1909;}
else{
if(Serial<=98506)
	{Year=1910;}
else{
if(Serial<=99012)
	{Year=1911;}
else{
if(Serial<=100352)
	{Year="1912 or 1913";}

else{Message="That was an invalid serial number";Year="";}
}}}}}}}}}}}}}}}}}}}}}}}}}}
alert (Message + Year+".");
}