//definie whitespace characters
var whitespace = " \t\n\t";
function isEmpty(s) {
    var i;
    if((s == null) || (s.length == 0))
        return true;
    // Search string looking for characters that are not whitespace
    for (i = 0; i < s.length; i++) {
        var c = s.charAt(i);
        if (whitespace.indexOf(c) == -1)
            return false;
    }
    // All characters are whitepace.
    return true;
}

// Basic validation of email address to see if it looks like an email address with @ sign
function isEmail(s) {
    var positionOfAt;
    positionOfAt = s.indexOf('@',1);
    if (isEmpty(s)) {
        return false;
    }
    if ((positionOfAt == -1) || (positionOfAt == (s.length-1))) {
        return false;
    }
    return true;
}

// Used by isInteger
function isDigit(c) {
    return ((c >= "0") && (c <= "9"));
}

// Check to make sure its all numbers
function isInteger(s) {
    var i, c;
    if (isEmpty(s))
        return false;
    for (i = 0; i < s.length; i++)  {
        // Check if all characters are numbers
        c = s.charAt(i);
        if (!isDigit(c))
            return false;
    }
    return true;
}

// Date Validation Javascript
// copyright 30th October 2004, by Stephen Chapman
// http://javascript.about.com

// You have permission to copy and use this javascript provided that
// the content of the script is not changed in any way.

//The complete script below not only handles both numeric and alpha months
//(including both upper and lower case and three letter month abbreviations)
//but you pass a second parameter to the validation function to tell the 
//routine which of the three formats that the date is supposed to be in
//(u for MDY, j for YMD, and w for DMY). There is also a third parameter where
//you pass a to indicate that all dates are valid, p to indicate that future
//dates are invalid, and f to indicate that past dates are invalid.


function valDateFmt(datefmt) {
myOption = -1;
for (i=0; i<datefmt.length; i++) {if (datefmt[i].checked) {myOption = i;}}
if (myOption == -1) {alert("You must select a date format");return ' ';}
return datefmt[myOption].value;}
function valDateRng(daterng) {myOption = -1;
for (i=0; i<daterng.length; i++) {if (daterng[i].checked) {myOption = i;}}
if (myOption == -1) {alert("You must select a date range");return ' ';}
return daterng[myOption].value;}
function stripBlanks(fld) {var result = "";for (i=0; i<fld.length; i++) {
if (fld.charAt(i) != " " || c > 0) {result += fld.charAt(i);
if (fld.charAt(i) != " ") c = result.length;}}return result.substr(0,c);}
var numb = '0123456789';
function isValid(parm,val) {if (parm == "") return true;
for (i=0; i<parm.length; i++) {if (val.indexOf(parm.charAt(i),0) == -1)
return false;}return true;}
function isNum(parm) {return isValid(parm,numb);}
var mth = new Array('','january','february','march','april','may','june','july','august','september','october','november','december');
var day = new Array(31,28,31,30,31,30,31,31,30,31,30,31);
function validateDate(fld,fmt,rng) {
var dd, mm, yy;var today = new Date;var t = new Date;fld = stripBlanks(fld);
if (fld == '') return false;var d1 = fld.split('\/');
if (d1.length != 3) d1 = fld.split(' ');
if (d1.length != 3) return false;
if (fmt == 'u' || fmt == 'U') {
  dd = d1[1]; mm = d1[0]; yy = d1[2];}
else if (fmt == 'j' || fmt == 'J') {
  dd = d1[2]; mm = d1[1]; yy = d1[0];}
else if (fmt == 'w' || fmt == 'W'){
  dd = d1[0]; mm = d1[1]; yy = d1[2];}
else return false;
var n = dd.lastIndexOf('st');
if (n > -1) dd = dd.substr(0,n);
n = dd.lastIndexOf('nd');
if (n > -1) dd = dd.substr(0,n);
n = dd.lastIndexOf('rd');
if (n > -1) dd = dd.substr(0,n);
n = dd.lastIndexOf('th');
if (n > -1) dd = dd.substr(0,n);
n = dd.lastIndexOf(',');
if (n > -1) dd = dd.substr(0,n);
n = mm.lastIndexOf(',');
if (n > -1) mm = mm.substr(0,n);
if (!isNum(dd)) return false;
if (!isNum(yy)) return false;
if (!isNum(mm)) {
  var nn = mm.toLowerCase();
  for (var i=1; i < 13; i++) {
    if (nn == mth[i] ||
        nn == mth[i].substr(0,3)) {mm = i; i = 13;}
  }
}
if (!isNum(mm)) return false;
dd = parseFloat(dd); mm = parseFloat(mm); yy = parseFloat(yy);
if (yy < 100) yy += 2000;
if (yy < 1582 || yy > 4881) return false;
if (mm == 2 && (yy%400 == 0 || (yy%4 == 0 && yy%100 != 0))) day[mm-1]++;
if (mm < 1 || mm > 12) return false;
if (dd < 1 || dd > day[mm-1]) return false;
t.setDate(dd); t.setMonth(mm-1); t.setFullYear(yy);
if (rng == 'p' || rng == 'P') {
if (t > today) return false;
}
else if (rng == 'f' || rng == 'F') {
if (t < today) return false;
}
else if (rng != 'a' && rng != 'A') return false;
return true;
}