/**
 * DHTML email validation script. Courtesy of SmartWebby.com (http://www.smartwebby.com/dhtml/)
 */

function echeck(str) {

		var at="@"
		var dot="."
		var lat=str.indexOf(at)
		var lstr=str.length
		var ldot=str.indexOf(dot)
		if (str.indexOf(at)==-1) return false;
		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr) return false;
		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr) return false;
		if (str.indexOf(at,(lat+1))!=-1) return false;
		if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot) return false;
		if (str.indexOf(dot,(lat+2))==-1) return false;
		if (str.indexOf(" ")!=-1) return false;
		return true
}

function isEmail(emailID){
	if ((emailID==null)||(emailID=="")) return true;
	if (echeck(emailID)==false) return false;
	return true
 }

/**
 * 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 isEuDate(dtStr){
	if (dtStr.length == 0) return true; // Added 21-may-2003 JC Error Log 683
	var daysInMonth = DaysArray(12)
	var pos1=dtStr.indexOf(dtCh)
	var pos2=dtStr.indexOf(dtCh,pos1+1)
	var strDay=dtStr.substring(0,pos1)
	var strMonth=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 (month<1 || month>12) return false;
	if (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
}
function isUsDate(dtStr){
	if (dtStr.length == 0) return true; // Added 21-may-2003 JC Error Log 683
	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 (month<1 || month>12) return false;
	if (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
}

function trimString(S) {
	return S.replace(/^\s+|\s+$/g,"");
}
function isblank(fld) {
	if (trimString(fld).length == 0) return true; else return false;
}
function isnum(fld) {
	var ret = true;
	if (fld.length > 0) {
		if (ret && isNaN(fld)) ret = false;
	}
	return ret;
}
function isSelected(fld) {
	var ret = true;
	if (fld.selectedIndex == -1) ret=false;
	return ret;
}
function isRadioSelected(fld) {
	var ret = false;
	for (i=0; i<fld.length; i++) {
		if (fld[i].checked) ret=true;
	}
	return ret;
}
function isPhoneNL(fld) {
	if (fld.length == 0) return true; 
        var pattern = /^[0]{1}[1-9]{1}[0-9]{8}$/;
  	return pattern.test(fld);

}
function isPostcodeNL(fld) {
	if (fld.length == 0) return true; 
	var pattern = /^[1-9]{1}[0-9]{3}[A-Za-z]{2}$/;
  	return (pattern.test(fld)); 

}