function SetFFStyle(el, status) {
	if (status == 'Bad')
	{
		// Backup current classname in cookie
		if (el.className != 'FormCheckBad')
		{		
			var expires = CookieExpires();
			Set_Cookie("ContactClassName", el.className,expires);
		}

		// Change classname to bad
		el.className = 'FormCheckBad';
	}
	else
	{
		// Get classname from cookie	
		var ContactClassName = Get_Cookie("ContactClassName");

		if (ContactClassName != 'FormCheckBad' && ContactClassName != '')
		{
			// Restore classname from cookie
			el.className = ContactClassName;
		}
		else
		{
			// Restore to default class	
			el.className = 'FormCheckGood';
		}
	}
}

function CheckField(fieldname, message) {
	if(fieldname) {
		if (fieldname.value == "") {
			SetFFStyle(fieldname, 'Bad');
			message = '- '+message+'\n';
			return message;
		} else {
			SetFFStyle(fieldname, 'Good');
			return '';
		}
	} else {
		return '';
	}
}

function CheckCheckbox(fieldname, message) {
	if(fieldname) {
		if (fieldname.checked != true) {
			SetFFStyle(fieldname, 'Bad');
			message = '- '+message+'\n';
			return message;
		} else {
			SetFFStyle(fieldname, 'Good');
			return '';
		}
	} else {
		return '';
	}
}

function CheckRadio(fieldname, message) {
	fields = document.customer_details.elements[fieldname];
	value=(GetCheckedValue(fields));
	if (value=='')
	{
		if (div=document.getElementById(fieldname))
			SetFFStyle(div, 'Bad');
		// doe nog iets hier, met een rood blokje of zo
		message = '- '+message+'\n';
		return message;
	}
	else
	{
		if (div=document.getElementById(fieldname))
			SetFFStyle(div, 'Good');
		return '';
	}
}

function CheckEmail(fieldname, message) {
	if(fieldname) {
		if (fieldname.value == "") {
			SetFFStyle(fieldname, 'Bad');
			message = '- '+message+'\n';
			return message;
		} else if (IsEmail(fieldname.value) == false) {
			SetFFStyle(fieldname, 'Bad');
			message = '- '+message+' is geen geldig e-mailadres !\n';
			return message;
		} else {
			SetFFStyle(fieldname, 'Good');
			return '';
		}
	} else {
		return '';		
	}
}

function IsEmail(str)
{
	var filter  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
	if (filter.test(str)) return true;
	else return false;
}

// return the value of the radio button that is checked
// return an empty string if none are checked, or
// there are no radio buttons
function GetCheckedValue(radioObj) {
	if(!radioObj)
		return "";
	var radioLength = radioObj.length;
	if(radioLength == undefined)
		if(radioObj.checked)
			return radioObj.value;
		else
			return "";
	for(var i = 0; i < radioLength; i++) {
		if(radioObj[i].checked) {
			return radioObj[i].value;
		}
	}
	return "";
}

// *******************************************************************************************
//	COOKIE
// *******************************************************************************************
function Get_Cookie(name) {
    var start = document.cookie.indexOf(name+"=");
    var len = start+name.length+1;
    if ((!start) && (name != document.cookie.substring(0,name.length))) return null;
    if (start == -1) return null;
    var end = document.cookie.indexOf(";",len);
    if (end == -1) end = document.cookie.length;
    return unescape(document.cookie.substring(len,end));
}

function Set_Cookie(name,value,expires,path,domain,secure) {
    document.cookie = name + "=" +escape(value) +
        ( (expires) ? ";expires=" + expires.toGMTString() : "") +
        ( (path) ? ";path=" + path : "") + 
        ( (domain) ? ";domain=" + domain : "") +
        ( (secure) ? ";secure" : "");
}
function CookieExpires() {
	var today	= new Date();
	var expires = new Date(today.getTime() + (56 * 86400000));
	
	return expires;
}