function date (form){
var serial=form.inputbox.value;
if(serial<=0)
	{message="That was an invalid serial number";year="";}
else{
message="Your Winchester Model 1873 was manufactured in ";
if(serial<=126)
	{year=1873;}
else{
if(serial<=2726)
	{year=1874;}
else{
if(serial<=11325)
	{year=1875;}
else{
if(serial<=23151)
	{year=1876;}
else{
if(serial<=23628)
	{year=1877;}
else{
if(serial<=27501)
	{year=1878;}
else{
if(serial<=41525)
	{year=1879;}
else{
if(serial<=63537)
	{year=1880;}
else{
if(serial<=81620)
	{year=1881;}
else{
if(serial<=109507)
	{year=1882;}
else{
if(serial<=145503)
	{year=1883;}
else{
if(serial<=175126)
	{year=1884;}
else{
if(serial<=196221)
	{year=1885;}
else{
if(serial<=222937)
	{year=1886;}
else{
if(serial<=225922)
	{year=1887;}
else{
if(serial<=284529)
	{year=1888;}
else{
if(serial<=323220)
	{year=1889;}
else{
if(serial<=363220)
	{year=1890;}
else{
if(serial<=405026)
	{year=1891;}
else{
if(serial<=441625)
	{year=1892;}
else{
if(serial<=466641)
	{year=1893;}
else{
if(serial<=481826)
	{year=1894;}
else{
if(serial<=499308)
	{year=1895;}
else{
if(serial<=507545)
	{year=1896;}
else{
if(serial<=513421)
	{year=1897;}
else{
if(serial<=525922)
	{year=1898;}
else{
if(serial<=541328)
	{year=1899;}
else{
if(serial<=554128)
	{year=1900;}
else{
if(serial<=557236)
	{year=1901;}
else{
if(serial<=564557)
	{year=1902;}
else{
if(serial<=573957)
	{year=1903;}
else{
if(serial<=588953)
	{year=1904;}
else{
if(serial<=602557)
	{year=1905;}
else{
if(serial<=613780)
	{year=1906;}
else{
if(serial<=630385)
	{year=1909;}
else{
if(serial<=656101)
	{year=1910;}
else{
if(serial<=669324)
	{year=1911;}
else{
if(serial<=678527)
	{year=1912;}
else{
if(serial<=684419)
	{year=1912;}
else{
if(serial<=686510)
	{year=1914;}
else{
if(serial<=688431)
	{year=1915;}
else{
if(serial<=694020)
	{year=1916;}
else{
if(serial<=698617)
	{year=1917;}
else{
if(serial<=700734)
	{year=1918;}
else{
if(serial<=702042)
	{year=1919;}
else{
if(serial<=702049)
	{year=1920;}
else{
if(serial<=702075)
	{year=1921;}
else{
if(serial<=702349)
	{year=1922;}
else{
if(serial<=720609)
	{year=1923;}
else{message="That was an invalid serial number";year="";}
}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}
alert (message + year +".");
}