function perc1()
{
if (document.formMain.code.value == "10OFF")
 {
 a = 90/100;
 b = a*document.form1.price.value;
 document.form1.amount.value = Math.round(b*100)/100;
 } 
 
else if (document.formMain.code.value == "TWENTY")
 {
 a = 80/100;
 b = a*document.form1.price.value;
 document.form1.amount.value = Math.round(b*100)/100;
 } 
 
else if (document.formMain.code.value == "THIRTY")
 {
 a = 70/100;
 b = a*document.form1.price.value;
 document.form1.amount.value = Math.round(b*100)/100;
 }
 
else {document.form1.amount.value = "14.95";}
}


function perc2()
{
if (document.formMain.code.value == "10OFF")
 {
 a = 90/100;
 b = a*document.form2.price.value;
 document.form2.amount.value = Math.round(b*100)/100;
 } 
 
else if (document.formMain.code.value == "TWENTY")
 {
 a = 80/100;
 b = a*document.form2.price.value;
 document.form2.amount.value = Math.round(b*100)/100;
 } 
 
else if (document.formMain.code.value == "THIRTY")
 {
 a = 70/100;
 b = a*document.form2.price.value;
 document.form2.amount.value = Math.round(b*100)/100;
 }
else {document.form2.amount.value = "29.95";}
}


function perc3()
{
if (document.formMain.code.value == "10OFF")
 {
 a = 90/100;
 b = a*document.form3.price.value;
 document.form3.amount.value = Math.round(b*100)/100;
 } 
 
else if (document.formMain.code.value == "TWENTY")
 {
 a = 80/100;
 b = a*document.form3.price.value;
 document.form3.amount.value = Math.round(b*100)/100;
 } 
 
else if (document.formMain.code.value == "THIRTY")
 {
 a = 70/100;
 b = a*document.form3.price.value;
 document.form3.amount.value = Math.round(b*100)/100;
 }
else {document.form3.amount.value = "49.95";}
}


function perc4()
{
if (document.formMain.code.value == "10OFF")
 {
 a = 90/100;
 b = a*document.form4.price.value;
 document.form4.amount.value = Math.round(b*100)/100;
 } 
 
else if (document.formMain.code.value == "TWENTY")
 {
 a = 80/100;
 b = a*document.form4.price.value;
 document.form4.amount.value = Math.round(b*100)/100;
 } 
 
else if (document.formMain.code.value == "THIRTY")
 {
 a = 70/100;
 b = a*document.form4.price.value;
 document.form4.amount.value = Math.round(b*100)/100;
 }
else {document.form4.amount.value = "69.95";}
}


function perc5()
{
if (document.formMain.code.value == "10OFF")
 {
 a = 90/100;
 b = a*document.form5.price.value;
 document.form5.amount.value = Math.round(b*100)/100;
 } 
 
else if (document.formMain.code.value == "TWENTY")
 {
 a = 80/100;
 b = a*document.form5.price.value;
 document.form5.amount.value = Math.round(b*100)/100;
 } 
 
else if (document.formMain.code.value == "THIRTY")
 {
 a = 70/100;
 b = a*document.form5.price.value;
 document.form5.amount.value = Math.round(b*100)/100;
 }
else {document.form5.amount.value = "89.95";}
}



function perc6()
{
if (document.formMain.code.value == "10OFF")
 {
 a = 90/100;
 b = a*document.form6.price.value;
 document.form6.amount.value = Math.round(b*100)/100;
 } 
 
else if (document.formMain.code.value == "TWENTY")
 {
 a = 80/100;
 b = a*document.form6.price.value;
 document.form6.amount.value = Math.round(b*100)/100;
 } 
 
else if (document.formMain.code.value == "THIRTY")
 {
 a = 70/100;
 b = a*document.form6.price.value;
 document.form6.amount.value = Math.round(b*100)/100;
 }
else {document.form6.amount.value = "159.95";}
}