function intValue(obj) {
	var boxes = document.subscribeForm.Interests;
	var j;
	var limit = 0;
	
	for (j=0; j<=boxes.length; j++) {
		if (boxes[j].checked == true) {
			limit = limit + 1;
		}
		if (limit > 5) {
			alert("Please limit you selection to 5.");
			obj.checked = false;
			break;
		}
	}
}

// isEmail (STRING s [, BOOLEAN emptyOK])
// whitespace characters
var whitespace = " \t\n\r";

// 
// Email address must be of form a@b.c ... in other words:
// * there must be at least one character before the @
// * there must be at least one character before and after the .
// * the characters @ and . are both required
function isValidEmail(s)
{   
	if (isEmpty(s)) return false;
   
	// is s whitespace?
	if (isWhitespace(s)) return false;
	    
	// there must be >= 1 character before @, so we
	// start looking at character position 1 
	// (i.e. second character)
	var i = 1;
	var sLength = s.length;

	// look for @
	while ((i < sLength) && (s.charAt(i) != "@"))
	{ i++
	}

	if ((i >= sLength) || (s.charAt(i) != "@")) return false;
	else i += 2;

	// look for .
	while ((i < sLength) && (s.charAt(i) != "."))
	{ i++
	}

	// there must be at least one character after the .
	if ((i >= sLength - 1) || (s.charAt(i) != ".")) return false;
	else return true;
}

// Check whether string s is empty.
function isEmpty(s)
{   
	return ((s == null) || (s.length == 0))
}

// Returns true if string s is empty or 
// whitespace characters only.
function isWhitespace(s)
{   
	var i;

    // Is s empty?
    if (isEmpty(s)) return true;

    // Search through string's characters one by one
    // until we find a non-whitespace character.
    // When we do, return false; if we don't, return true.
    for (i = 0; i < s.length; i++)
    {   
		// Check that current character isn't whitespace.
		var c = s.charAt(i);

		if (whitespace.indexOf(c) == -1) return false;
    }
    // All characters are whitespace.
    return true;
}

function checkForm() {
	var trigger = 0;
	
	// set birthdate value
	if ((document.subscribeForm.month.value != "") && (document.subscribeForm.day.value != "") && (document.subscribeForm.year.value != "")) {
    	document.subscribeForm.BirthDate.value = document.subscribeForm.month.value + '/' + document.subscribeForm.day.value + '/' + document.subscribeForm.year.value;
  	}
	
	if (!isValidEmail(document.subscribeForm.elements['Email Address'].value)) {
		document.subscribeForm.elements['Email Address'].style.backgroundColor='#FBF2E3';
		// alert("Please enter a valid Email Address. (name@host.com)");
		document.subscribeForm.elements['Email Address'].focus();
		trigger = 2;
	}
	
	// confirm email
	if (document.subscribeForm.elements['Email Address'].value != document.subscribeForm.confirmEmail.value) {
		document.subscribeForm.elements['Email Address'].style.backgroundColor='#FBF2E3';
		document.subscribeForm.confirmEmail.style.backgroundColor='#FBF2E3';
		trigger = 2;
	}
	
	// check required fields
	var x;
	var fieldlist = new Array();
		fieldlist[0] = "FirstName";
		fieldlist[1] = "LastName";
		fieldlist[2] = "Address1";
		fieldlist[3] = "City";
		fieldlist[4] = "ZipCode";
		fieldlist[5] = "month";
		fieldlist[6] = "day";
		fieldlist[7] = "year";
		fieldlist[8] = "Gender";
	
	for (x in fieldlist) {
		if (document.subscribeForm.elements[fieldlist[x]].value == "") {
			document.subscribeForm.elements[fieldlist[x]].style.backgroundColor='#FBF2E3';
			trigger = 1;
		} else {
			document.subscribeForm.elements[fieldlist[x]].style.backgroundColor='#FFFFFF';
		}
	}
	
	// trigger
	if (trigger == 1) {
		alert("Please complete all required fields.");
		return false;
	}
	else if (trigger == 2) {
		alert("Please enter a valid Email Address. (name@host.com)");
		document.subscribeForm.elements['Email Address'].focus();
		return false;
	}
	
	// checkboxes
	var trigger = 0;
	var j;
	
	for (j=0; j<=20; j++) {
		if (document.subscribeForm.Interests[j].checked == true) {
			trigger = 1;
			break;
		}
	}
	
	if (trigger == 0) {
		document.getElementById("inter").style.backgroundColor='#FBF2E3';
		alert("Please select your interests.");
		return false;
	}
	
	// check agree
	if (document.subscribeForm.Agree.checked == false) {
		alert("You must agree to the User Agreement and Privacy Policy.");
		return false;
	}
}