function price_update() {

		// set var number to current active radio button
		x=document.sub_order.subscr.length; 
		for (i=0; i<x; i++){
			if(document.sub_order.subscr[i].checked) var number = document.sub_order.subscr[i].value
		}

		// find out which country is selected
		country = document.sub_order.country.options[document.sub_order.country.selectedIndex].text;

		if(number == 1){
			document.sub_order.item_name.value = "1 year subscription: Today's Horse Trader Magazine";
				if(country == 'United States of America'){
					//THT001D,THT001C,THT001F
					document.sub_order.item_number.value = "THT001D";
					document.sub_order.amount.value = 19.99;
				}else if(country == 'Canada'){
					document.sub_order.item_number.value = "THT001C";
					document.sub_order.amount.value = 29.99;
				}else{
					document.sub_order.item_number.value = "THT001F";
					document.sub_order.amount.value = 39.99;
				}
    }else if(number == 2){
			document.sub_order.item_name.value = "2 year subscription: Today's Horse Trader Magazine";
				if(country == 'United States of America'){
					//THT001D,THT001C,THT001F
					document.sub_order.item_number.value = "THT002D";
					document.sub_order.amount.value = 34.99;
				}else if(country == 'Canada'){
					document.sub_order.item_number.value = "THT002C";
					document.sub_order.amount.value = 44.99;
				}else{
					document.sub_order.item_number.value = "THT002F";
					document.sub_order.amount.value = 54.99;
				}
    }
}

function validate_form(){
    if ( document.sub_order.first_name.value == "" )
    {
        alert ( "First Name required." );
				document.sub_order.first_name.focus();
				document.sub_order.first_name.select();
        return (false);
    }

    if ( document.sub_order.last_name.value == "" )
    {
        alert ( "Last Name required." );
				document.sub_order.last_name.focus();
				document.sub_order.last_name.select();
        return (false);
    }

    if ( document.sub_order.address1.value == "")
    {
        alert ( "Street Address required." );
				document.sub_order.address1.focus();
				document.sub_order.address1.select();
        return (false);
    }

    if ( document.sub_order.city.value == "")
    {
        alert ( "State/Province required." );
				document.sub_order.city.focus();
				document.sub_order.city.select();
        return (false);
    }

		if ( document.forms['sub_order'].elements['state'].value == "none" )
    {
        alert ( "Please select a state." );
        return (false);
    }

		if ( document.sub_order.zip.value == "")
    {
        alert ( "Postal Code required." );
				document.sub_order.zip.focus();
				document.sub_order.zip.select();
        return (false);
    }

    if ( document.sub_order.email.value == "")
    {
        alert ( "Email Address required." );
				document.sub_order.email.focus();
				document.sub_order.email.select();
        return (false);
    }

		if ( document.sub_order.email.value != "")
    {

				var emailStr = document.sub_order.email.value;
				
				/* The following variable tells the rest of the function whether or not
				to verify that the address ends in a two-letter country or well-known
				TLD.  1 means check it, 0 means don't. */
				
				var checkTLD=1;
				
				/* The following is the list of known TLDs that an e-mail address must end with. */
				
				var knownDomsPat=/^(com|net|org|edu|int|mil|gov|arpa|biz|aero|name|coop|info|pro|museum)$/;
				
				/* The following pattern is used to check if the entered e-mail address
				fits the user@domain format.  It also is used to separate the username
				from the domain. */
				
				var emailPat=/^(.+)@(.+)$/;
				
				/* The following string represents the pattern for matching all special
				characters.  We don't want to allow special characters in the address. 
				These characters include ( ) < > @ , ; : \ " . [ ] */
				
				var specialChars="\\(\\)><@,;:\\\\\\\"\\.\\[\\]";
				
				/* The following string represents the range of characters allowed in a 
				username or domainname.  It really states which chars aren't allowed.*/
				
				var validChars="\[^\\s" + specialChars + "\]";
				
				/* The following pattern applies if the "user" is a quoted string (in
				which case, there are no rules about which characters are allowed
				and which aren't; anything goes).  E.g. "jiminy cricket"@disney.com
				is a legal e-mail address. */
				
				var quotedUser="(\"[^\"]*\")";
				
				/* The following pattern applies for domains that are IP addresses,
				rather than symbolic names.  E.g. joe@[123.124.233.4] is a legal
				e-mail address. NOTE: The square brackets are required. */
				
				var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/;
				
				/* The following string represents an atom (basically a series of non-special characters.) */
				
				var atom=validChars + '+';
				
				/* The following string represents one word in the typical username.
				For example, in john.doe@somewhere.com, john and doe are words.
				Basically, a word is either an atom or quoted string. */
				
				var word="(" + atom + "|" + quotedUser + ")";
				
				// The following pattern describes the structure of the user
				
				var userPat=new RegExp("^" + word + "(\\." + word + ")*$");
				
				/* The following pattern describes the structure of a normal symbolic
				domain, as opposed to ipDomainPat, shown above. */
				
				var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$");
				
				/* Finally, let's start trying to figure out if the supplied address is valid. */
				
				/* Begin with the coarse pattern to simply break up user@domain into
				different pieces that are easy to analyze. */
				
				var matchArray=emailStr.match(emailPat);
				
				if (matchArray==null) {
				
				/* Too many/few @'s or something; basically, this address doesn't
				even fit the general mould of a valid e-mail address. */
				
				alert("Email address seems incorrect (check @ and .'s)");
				return false;
				}
				var user=matchArray[1];
				var domain=matchArray[2];
				
				// Start by checking that only basic ASCII characters are in the strings (0-127).
				
				for (i=0; i<user.length; i++) {
				if (user.charCodeAt(i)>127) {
				alert("Ths username contains invalid characters.");
				return false;
					 }
				}
				for (i=0; i<domain.length; i++) {
				if (domain.charCodeAt(i)>127) {
				alert("Ths domain name contains invalid characters.");
				return false;
					 }
				}
				
				// See if "user" is valid 
				
				if (user.match(userPat)==null) {
				
				// user is not valid
				
				alert("Your email address doesn't seem to be valid.");
				return false;

				}
				
				/* if the e-mail address is at an IP address (as opposed to a symbolic
				host name) make sure the IP address is valid. */
				
				var IPArray=domain.match(ipDomainPat);
				if (IPArray!=null) {
				
				// this is an IP address
				
				for (var i=1;i<=4;i++) {
				if (IPArray[i]>255) {
				alert("Destination IP address is invalid!");
				return false;
					 }
				}
				return true;
				}
				
				// Domain is symbolic name.  Check if it's valid.
				 
				var atomPat=new RegExp("^" + atom + "$");
				var domArr=domain.split(".");
				var len=domArr.length;
				for (i=0;i<len;i++) {
				if (domArr[i].search(atomPat)==-1) {
				alert("The domain name does not seem to be valid.");
				return false;
					 }
				}
				
				/* domain name seems valid, but now make sure that it ends in a
				known top-level domain (like com, edu, gov) or a two-letter word,
				representing country (uk, nl), and that there's a hostname preceding 
				the domain or country. */
				
				if (checkTLD && domArr[domArr.length-1].length!=2 && 
				domArr[domArr.length-1].search(knownDomsPat)==-1) {
				alert("The address must end in a well-known domain or two letter " + "country.");
				return false;
				}
				
				// Make sure there's a host name preceding the domain.
				
				if (len<2) {
				alert("This address is missing a hostname!");
				return false;
				}
    }
}

function validate_form2(){
    if ( document.sub_order.first_name.value == "" )
    {
        alert ( "First Name required." );
				document.sub_order.first_name.focus();
				document.sub_order.first_name.select();
        return (false);
    }

    if ( document.sub_order.last_name.value == "" )
    {
        alert ( "Last Name required." );
				document.sub_order.last_name.focus();
				document.sub_order.last_name.select();
        return (false);
    }

    if ( document.sub_order.address1.value == "")
    {
        alert ( "Street Address required." );
				document.sub_order.address1.focus();
				document.sub_order.address1.select();
        return (false);
    }

    if ( document.sub_order.city.value == "")
    {
        alert ( "State/Province required." );
				document.sub_order.city.focus();
				document.sub_order.city.select();
        return (false);
    }

		if ( document.forms['sub_order'].elements['state'].value == "none" )
    {
        alert ( "Please select a state." );
        return (false);
    }

		if ( document.sub_order.zip.value == "")
    {
        alert ( "Postal Code required." );
				document.sub_order.zip.focus();
				document.sub_order.zip.select();
        return (false);
    }

		if ( document.sub_order.contactPhone.value == "")
    {
        alert ( "Your Phone Number is required." );
				document.sub_order.contactPhone.focus();
				document.sub_order.contactPhone.select();
        return (false);
    }
}