var defaultEmptyOK = false

//--------------------------------------------------
var reEmail = /^.+\@.+\..+$/
function isEmail (s)
{   if (isEmpty(s)) 
       if (isEmail.arguments.length == 1) return defaultEmptyOK;
       else return (isEmail.arguments[1] == true);
    
    else {
       return reEmail.test(s)
    }
}
function checkEmail (theField, emptyOK)
{   if (checkEmail.arguments.length == 1) emptyOK = defaultEmptyOK;
    if ((emptyOK == true) && (isEmpty(theField.value))) return true;
    else if (!isEmail(theField.value, false)) 
       //return warnInvalid (theField, iEmail);
	 return false;
    else return true;
}

//--------------------------------------------------
var reWhitespace = /^\s+$/
function isEmpty(s)
{   return ((s == null) || (s.length == 0))
}
function isWhitespace (s)
{   // Is s empty?
    return (isEmpty(s) || reWhitespace.test(s));
}
function stripCharsInRE (s, bag)

{       return s.replace(bag, "")
}
function stripCharsInBag (s, bag)
{   var i;
    var returnString = "";
    for (i = 0; i < s.length; i++)
    {   
        // Check that current character isn't whitespace.
        var c = s.charAt(i);
        if (bag.indexOf(c) == -1) returnString += c;
    }
    return returnString;
}
function stripCharsNotInBag (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 stripWhitespace (s)
{   return stripCharsInBag (s, " ")
}
//---------------------------------------------------
var reInteger = /^\d+$/
//var reSignedInteger = /^+|-?(\d+)$/
var reFloat = /^((\d+(\.\d*)?)|((\d*\.)?\d+))$/
//var reSignedFloat = /^(((+|-)?\d+(\.\d*)?)|((+|-)?(\d*\.)?\d+))$/
//var reSignedFloat = /^(((+|-)?\d+(\.\d*)?)|(((+|-)?\d*\.)?\d+))$/

function isInteger (s)
{   var i;
    if (isEmpty(s)) 
       if (isInteger.arguments.length == 1) return defaultEmptyOK;
       else return (isInteger.arguments[1] == true);
    return reInteger.test(s)
}
function isSignedFloat (s)
/*
{   if (isEmpty(s)) 
       if (isSignedFloat.arguments.length == 1) return defaultEmptyOK;
       else return (isSignedFloat.arguments[1] == true);

    else {
       return reSignedFloat.test(s)
    }
}
*/

{	
	if	((s.substring(0,1) == "-")||(s.substring(0,1) == "+"))
		{
			s=s.substring(1,s.length)
		}
	return isFloat(s)
}
function isFloat (s)

{   if (isEmpty(s)) 
       if (isFloat.arguments.length == 1) return defaultEmptyOK;
       else return (isFloat.arguments[1] == true);

    return reFloat.test(s)
}


//---------------------------------------------------
function promptEntry (s)
{   window.status = pEntryPrompt + s
}
//---------------------------------------------------
function warnInvalid (theField, s)
{   theField.focus()
    theField.select()
    alert(s)
    return false
}

//---------------------------------------------------
function toAlpha(checkString)
{
    newString = "";    // REVISED/CORRECTED STRING
    count = 0;         // COUNTER FOR LOOPING THROUGH STRING

    // LOOP THROUGH STRING CHARACTER BY CHARACTER
    for (i = 0; i < checkString.length; i++) {
        ch = checkString.substring(i, i+1);

        // ENSURE CHARACTER IS AN ALPHA CHARACTER
        if ((ch >= "a" && ch <= "z") || (ch >= "A" && ch <= "Z" )) {
            newString += ch;
        }
    }
    return newString;
}

function isValidEmail(str) {
   var res = (str.indexOf(".") > 2) && (str.indexOf("@") > 0);
   if (res == false) alert ('Please enter a valid e-mail address.');
   return res;
 
}

function validateDate(fld) {
    var RegExPattern = /^(?=\d)(?:(?:(?:(?:(?:0?[13578]|1[02])(\/|-|\.)31)\1|(?:(?:0?[1,3-9]|1[0-2])(\/|-|\.)(?:29|30)\2))(?:(?:1[6-9]|[2-9]\d)?\d{2})|(?:0?2(\/|-|\.)29\3(?:(?:(?:1[6-9]|[2-9]\d)?(?:0[48]|[2468][048]|[13579][26])|(?:(?:16|[2468][048]|[3579][26])00))))|(?:(?:0?[1-9])|(?:1[0-2]))(\/|-|\.)(?:0?[1-9]|1\d|2[0-8])\4(?:(?:1[6-9]|[2-9]\d)?\d{2}))($|\ (?=\d)))?(((0?[1-9]|1[012])(:[0-5]\d){0,2}(\ [AP]M))|([01]\d|2[0-3])(:[0-5]\d){1,2})?$/;
    var errorMessage = 'Please enter valid date as month, day, and four digit year.\nYou may use a slash, hyphen or period to separate the values.\nThe date must be a real date. 2-30-2000 would not be accepted.\nFormay mm/dd/yyyy.';
    if ((fld.value.match(RegExPattern)) && (fld.value!='')) {
        return true; 
    } else {
        return false;
    } 
}