// make sure user selects credit card type
function checkCC() {
ccType = -1
for (i=0; i<document.form.CC.length; i++) {
if (document.form.CC[i].checked)
ccType = i
}
if (ccType == -1) {
alert("Please select a credit card type.");
document.form.CC[0].focus()
return false
}
}