function calcDoggieTankPrice(form)
{doggietank.custom.value = doggietank.custom1.value + " " + doggietank.custom2.value + " " + 
doggietank.custom3.value + " " + doggietank.custom4.value + " " + doggietank.custom5.value + " " + 
doggietank.custom6.value;
doggietank.os0.value = doggietank.custom.value;

if ((doggietank.custom1.value == "XL") || (doggietank.custom1.value == "2X"))
{doggietank.amount.value = 20.00;}

else
{doggietank.amount.value = 18.00;}
}