function validate_required(field,alerttxt) {
	with (field) {
		if (value==null||value=="")
		  {alert(alerttxt);return false;}
		else {return true}
	}
}

function validate_email(field,alerttxt) {
	with (field) {
		apos=value.indexOf("@");
		dotpos=value.lastIndexOf(".");
		if (apos<1||dotpos-apos<2) 
		  {alert(alerttxt);return false;}
		else {return true;}
	}
}


function validate_chapter(alerttxt) {
	var selected_value = $('chapter').options[$('chapter').selectedIndex].value;
	 if (selected_value == "DNS")
	{alert(alerttxt);return false;}
	else {return true;}
}

/* function validate_state(alerttxt) {
	var selected_value = $('billstate').options[$('billstate').selectedIndex].value;
	 if (selected_value == "DNS")
	{alert(alerttxt);return false;}
	else {return true;}
} */

/* function check_billtype(alerttxt) {
	for (i=0;i<document.form.paymenttype.length;i++) {
	if (document.form.paymenttype[i].checked) {
		var selected_type = document.form.paymenttype[i].value;
		}
	}
    if (selected_value == "creditcard")
    {return false;}
    else {return true;} 
}
	
function validate_card(alerttxt) {
	var selected_value = $('cardtype').options[$('cardtype').selectedIndex].value;
	 if (selected_value == "DNS")
	{alert(alerttxt);return false;}
	
} */


function validate_form(thisform) {
	with (thisform) {
		/*if (check_billtype("Please check a payment choice.")==false) {
		if (validate_card("Please select a card type.")==false)
		  {return false;}
		if (validate_required(cardnumber,"Please enter a credit card number.")==false)
		  {cardnumber.focus();return false;}
		if (validate_required(expirationmonth,"Please enter the expiration month.")==false)
		  {expirationmonth.focus();return false;}
		if (validate_required(expirationyear,"Please enter the expiration year.")==false)
		  {expirationyear.focus();return false;}
		if (validate_required(CSC,"Please enter the security code.")==false)
		  {CSC.focus();return false;}	
		}*/
		
		
		if (validate_required(firstname,"Please enter a first name.")==false)
		  {firstname.focus();return false;}
		if (validate_required(lastname,"Please enter a last name.")==false)
		  {lastname.focus();return false;}
		 if (validate_chapter("Please select a chapter.")==false)
		  {return false;}
		  if (validate_required(graduation,"Please enter a graduation year.")==false)
		  {graduation.focus();return false;}
		  if (validate_required(billfname,"Please enter a name.")==false)
		  {billfname.focus();return false;}
		if (validate_required(billlname,"Please enter a last name.")==false)
		  {billlname.focus();return false;}
		if (validate_required(billaddress,"Please provide an address.")==false)
		  {billaddress.focus();return false;}
		if (validate_required(billcity,"Please add a city.")==false)
		  {billcity.focus();return false;}
		/*  if (validate_state("Please select a state.")==false)
		  {return false;} */
		/*if (validate_required(billZIP, "Please add a ZIP code.")==false)
		  {billZIP.focus();return false;} */
		if (validate_required(billemail,"Please enter an email address.")==false)
		  {billemail.focus();return false;}
		if (validate_email(billemail,"Please enter a valid email address.")==false)
		  {billemail.focus();return false;}
		  if (validate_required(billphone,"Please enter a phone number.")==false)
		  {billphone.focus();return false;}
		


	}
}