function isValid(p_string, p_ruletype)
{
	switch(p_ruletype)
	{
		case 'e': //email
			var rule = /^[a-zA-Z\d._-]+@([a-zA-Z\d.-]+\.)+[a-zA-Z\d.-]{2,4}$/
			break;
		case 'n': //numeric
			var rule = /^\d*$/
			break;
		case 'an': //alpha-numeric
			var rule = /^[A-Za-z\d]*$/
			break;
		case 'z': //u.s. zipcode or canadian postal code
			var rule  = /(^([a-zA-Z]\d){3}$)|(^\d{5}$)|(^\d{5}-\d{4}$)/;
			break;
		case 'p': //price
			var rule = /^[$]?\d*([.]?\d+){0,1}$/
			break;
		case 'ph': //phone
			var rule = /((\+\d{1,3}(-| )?\(?\d\)?(-| )?\d{1,3})|(\(?\d{2,3}\)?))(-| )?(\d{3,4})(-| )?(\d{4})(( x| ext)\d{1,5}){0,1}/
			break;
		case 'y': //year
			var rule = /^(19|20)\d{2}$/
			break;
		case 'w': //whitespace only
			var rule = /^\s*$/
			break;
		case 't': // time
			var rule = /^(([0-1]{0,1}[0-9]|[2][0-4]))(:([0-5][0-9]))?(:([0-5][0-9]))?(\s?(AM|am|PM|pm)?)$/
			break;
		case 'na': // name
			var rule = /^[A-Za-z .-]*$/
			break;
		default:
			return false;
	}

	return rule.test(p_string);
}

function checkField(p_field, p_fieldtype, p_fieldname)
{
	var msg = '';
	if (p_field)
	{
		switch(p_fieldtype)
		{
			case 'nb':
				if ((isValid(p_field.value,'w')) || (p_field.value == ''))
					msg = p_fieldname + ' is required!';
				break;
			case 'an':
				if ((!isValid(p_field.value,'an')) || (p_field.value == ''))
				    msg = ((p_fieldname != '') ? 'Invalid '+p_fieldname+'. ' : '') + 'Only Numbers and Letters are allowed.';
				break;
			case 'na':
				if ((!isValid(p_field.value,'na')) || (p_field.value == ''))
				    msg = ((p_fieldname != '') ? 'Invalid '+p_fieldname+'. ' : '') + 'Please enter a valid name. ie. John Doe Jr.';
				break;
			case 'e':
				if ((!isValid(p_field.value,'e')) || (p_field.value == ''))
					msg = ((p_fieldname != '') ? 'Invalid '+p_fieldname+'. ' : '') + 'Please enter a valid e-mail address.';
				break;
			case 'z':  //zipcode US or Canadian
				if ((!isValid(p_field.value,'z')) || (p_field.value == ''))
					msg = ((p_fieldname != '') ? 'Invalid '+p_fieldname+'. ' : '') + 'Please enter a valid Postal Code';
				break;
			case 'n':  //numeric
				if ((!isValid(p_field.value,'n')) || (p_field.value == ''))
					msg = ((p_fieldname != '') ? 'Invalid '+p_fieldname+'. ' : '') + 'Please enter a numeric value.';
				break;
			case 'p':  //price
				if ((!isValid(p_field.value,'p')) || (p_field.value == ''))
					msg = ((p_fieldname != '') ? 'Invalid '+p_fieldname+'. ' : '') + 'Please enter a valid price. ex. 4999';
				break;
			case 'ph':  //phone
				if ((!isValid(p_field.value,'ph')) || (p_field.value == ''))
					msg = ((p_fieldname != '') ? 'Invalid '+p_fieldname+'. ' : '') + 'Please enter a valid phone number. (eg. 757-555-9999 or 757-555-8888 x3401)';
				break;
			case 'y':  //year
				if ((!isValid(p_field.value,'y')) || (p_field.value == ''))
					msg = ((p_fieldname != '') ? 'Invalid '+p_fieldname+'. ' : '') + 'Please enter a valid year. ex 1999';
				break;
			case 't':
				if ((!isValid(p_field.value,'t')) || (p_field.value == ''))
					msg = p_fieldname + ' is not a valid time! ex 1PM, 10:30AM,  14:00';
				break;
			case 'd':
				if ((!isDate(p_field.value)) || (p_field.value == ''))
			    {
					msg = p_fieldname + ' is not a valid date! (eg. 1/15/1986, 12/10/1975)';
				}
				break;

			default:
				msg = p_fieldtype + ' not defined!';
		}
	}

	if (msg != "")
	{
		displayError(msg);
		return false;
	}
	else
	{
		displayError('');
		return true;
	}
}

function displayError(p_msg)
{
	if (document.getElementById('error-footer'))
	{
		document.getElementById('error-footer').style.display = (p_msg != '') ? 'block' : 'none';
		document.getElementById('error-footer').innerHTML = '<p>'+p_msg+'</p>';
	}

	if (document.getElementById('error'))
	{
		document.getElementById('error').style.display  = (p_msg != '') ? 'block' : 'none';
		document.getElementById('error').innerHTML = '<p>'+p_msg+'</p>';
	}
	else
	{
		alert(p_msg);
	}

	if (document.getElementById('success'))
	{
		document.getElementById('success').style.display='none';
	}

}


function matchFields(p_field1, p_field2, p_fieldnames)
{
	if (p_field1.value != p_field2.value)
	{
		displayError(p_fieldnames + " do not match!");
		p_field1.focus();
		return false;
	}
	else
		return true;
}

function isChecked(p_element_name)
{
	var elementLength = p_element_name.length;
	var inputElement = document.getElementsByTagName('input'); 
	for (var i = 0; i < inputElement.length; i++)
	{
		if ((inputElement[i].type == 'checkbox') && (inputElement[i].name.substring(0, elementLength) == p_element_name) && (inputElement[i].checked))
		{ 
			return true;
		} 
	}
	return false;

}

/**
 * DHTML date validation script. Courtesy of SmartWebby.com (http://www.smartwebby.com/dhtml/)
 */
// Declaring valid date character, minimum year and maximum year

var dtCh= "/";
var minYear=1900;
var maxYear=2100;

function isInteger(s){
	var i;
    for (i = 0; i < s.length; i++){
        // Check that current character is number.
        var c = s.charAt(i);
        if (((c < "0") || (c > "9"))) return false;
    }
    // All characters are numbers.
    return true;
}

function stripCharsInBag(s, bag){
	var i;
    var returnString = "";
    // Search through string's characters one by one.
    // If character is not in bag, append to returnString.
    for (i = 0; i < s.length; i++){
        var c = s.charAt(i);
        if (bag.indexOf(c) == -1) returnString += c;
    }
    return returnString;
}

function daysInFebruary (year){
	// February has 29 days in any year evenly divisible by four,
    // EXCEPT for centurial years which are not also divisible by 400.
    return (((year % 4 == 0) && ( (!(year % 100 == 0)) || (year % 400 == 0))) ? 29 : 28 );
}
function daysArray(n) {
	for (var i = 1; i <= n; i++) {
		this[i] = 31
		if (i==4 || i==6 || i==9 || i==11) {this[i] = 30}
		if (i==2) {this[i] = 29}
   }
   return this
}

function isDate(dtStr)
{
	var daysInMonth = daysArray(12)
	var pos1=dtStr.indexOf(dtCh)
	var pos2=dtStr.indexOf(dtCh,pos1+1)
	var strMonth=dtStr.substring(0,pos1)
	var strDay=dtStr.substring(pos1+1,pos2)
	var strYear=dtStr.substring(pos2+1)
	strYr=strYear
	if (strDay.charAt(0)=="0" && strDay.length>1) strDay=strDay.substring(1)
	if (strMonth.charAt(0)=="0" && strMonth.length>1) strMonth=strMonth.substring(1)
	for (var i = 1; i <= 3; i++) {
		if (strYr.charAt(0)=="0" && strYr.length>1) strYr=strYr.substring(1)
	}
	month=parseInt(strMonth)
	day=parseInt(strDay)
	year=parseInt(strYr)
	if (pos1==-1 || pos2==-1){
		return false
	}
	if (strMonth.length<1 || month<1 || month>12){
		return false
	}
	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
		return false
	}
	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
		return false
	}
	if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
		return false
	}
	return true
}