function checkLength(minl, maxl, stval, fieldname){
if(stval.length<minl || stval.length>maxl){
if(minl!=maxl){
msg=msg+count+". The "+fieldname+" must be "+minl+" to "+ maxl+" characters length.\n"
}else{
msg=msg+count+". The "+fieldname+" must be "+minl+" characters length.\n"
}
count++
return false
}else{
return true
}
}

function check_pass(minl, maxl, stval){
if(stval.length<minl || stval.length>maxl){
return false
}else{
return true
}
}

function IsEmpty(stValue) {
if ((stValue.length==0) || (stValue==null)) {
return true;
}else { 
return false; 
}
}

function validateZIP(field) {
var valid = "0123456789-";
var hyphencount = 0;

if (field.length!=5 && field.length!=10) {
msg=msg+count+". Please enter your 5 digit or 5 digit+4 zip code.\n"
count++
return false;
}
for (var i=0; i < field.length; i++) {
temp = "" + field.substring(i, i+1);
if (temp == "-") hyphencount++;
if (valid.indexOf(temp) == "-1") {
msg=msg+count+". Invalid characters in your zip code.\n"
count++
return false;
}
if ((hyphencount > 1) || ((field.length==10) && ""+field.charAt(5)!="-")) {
msg=msg+count+". The hyphen character should be used with a properly formatted 5 digit+four zip code, like '12345-6789'.\n"
count++
return false;
}
}
return true;
}

function isInteger(s){
var i;
if(IsEmpty(s)){
return false;	
}
for (i = 0; i < s.length; i++){   
var c = s.charAt(i);
if (((c < "0") || (c > "9"))) return false;
}
return true;
}

function stripCharsInBag(s, bag){
var i;
var returnString = "";
for (i = 0; i < s.length; i++){   
var c = s.charAt(i);
if (bag.indexOf(c) == -1) returnString += c;
}
return returnString;
}
 
function checknumber(nvalue){
var anum=/(^\d+$)|(^\d+\.\d+$)/
if (anum.test(nvalue))
testresult=true
else{
testresult=false
}
return (testresult)
}

function format (expr, decplaces) {
var str = "" + Math.round (eval(expr) * Math.pow(10,decplaces))
while (str.length <= decplaces) {
	str = "0" + str
}
var decpoint = str.length - decplaces
return str.substring(0,decpoint) + "." + str.substring(decpoint,str.length);
}

function dollarize (expr) {
return format(expr,2)
}


function emailCheck (emailStr) {
var emailPat=/^(.+)@(.+)$/;
var specialChars="\\(\\)><@,;:\\\\\\\"\\.\\[\\]";
var validChars="\[^\\s" + specialChars + "\]";
var quotedUser="(\"[^\"]*\")";
var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/;
var atom=validChars + '+';
var word="(" + atom + "|" + quotedUser + ")";
var userPat=new RegExp("^" + word + "(\\." + word + ")*$");
var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$");
var matchArray=emailStr.match(emailPat);

if (matchArray==null) {
return false;
}
var user=matchArray[1];
var domain=matchArray[2];

for (i=0; i<user.length; i++) {
if (user.charCodeAt(i)>127) {
return false;
}}
for (i=0; i<domain.length; i++) {
if (domain.charCodeAt(i)>127) {
return false;
}}

if (user.match(userPat)==null) {
return false;
}

var IPArray=domain.match(ipDomainPat);
if (IPArray!=null) {
for (var i=1;i<=4;i++) {
if (IPArray[i]>255) {
return false;
}}
return true;
}
 
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) {
return false;
}}

if (len<2) {
return false;
}

return true;
}

var phoneNumberDelimiters = "()- ";
var validWorldPhoneChars = phoneNumberDelimiters + "+";
var minDigitsInIPhoneNumber = 10;

function checkInternationalPhone(strPhone){
s=stripCharsInBag(strPhone,validWorldPhoneChars);
return (checknumber(s) && s.length >= minDigitsInIPhoneNumber);
}

function ValidatePhone(Phone){
if ((Phone==null)||(Phone=="")){
return false
}
if (checkInternationalPhone(Phone)==false){
return false
}
return true
}

function isCheckedRadio(btnRadio) {
for (var i=0;i<btnRadio.length;i++) {
if (btnRadio[i].checked==true) {
return true;
}
}
return false;
}

function daysInFebruary (year){
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){
DTO_msg="";
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
}