﻿//---------------------------------------------------------------------------------------------------------------
//EVEN THOUGH THESE FUNCTIONS EXIST IN WUC, THEY WERE ADDED HERE AS WELL SO WE DIDN'T HAVE TO LOAD THE LARGE
//WUC.JS FILE FOR THE PUBLIC SECTION OF THE WEBSITE:
//---------------------------------------------------------------------------------------------------------------
function CBln(value){ 

	value = Trim(value.toLowerCase());
	return (value == "true"?true:false);
	
}
//---------------------------------------------------------------------------------------------------------------
function CInt(value){ 

	return (value * 1);
	
}
//---------------------------------------------------------------------------------------------------------------
function Replace(value, removeText, insertText){

	value = value.toString();	

	return value.split(removeText).join(insertText);	
}
//---------------------------------------------------------------------------------------------------------------
function Trim(value){

	value = value.toString();

	return LTrim(RTrim(value));	
}
//---------------------------------------------------------------------------------------------------------------
function LTrim(value){	
	var spaceIndex = value.search( /^\s*(\S.*)/ );
	return ( ( spaceIndex == -1 ) ? "" : RegExp.$1 );
}
//---------------------------------------------------------------------------------------------------------------
function RTrim(value){	
	var spaceIndex = value.search( /\s+$/ );
	return ( ( spaceIndex == -1 ) ? value : value.substr( 0, spaceIndex ) );
} 
//---------------------------------------------------------------------------------------------------------------
function GetUniqueCode(){

	var dateObject = new Date();
	var uniqueCode = "" + dateObject.getYear() + dateObject.getMonth() + 
		dateObject.getDate() + dateObject.getHours() +
		dateObject.getMinutes() + dateObject.getSeconds() + dateObject.getMilliseconds();
		
	return uniqueCode;

}
//---------------------------------------------------------------------------------------------------------------
function HtmlDecode(s){ 

      var out = ""; 
      if (s==null) return;   

      var l = s.length; 
      for (var i=0; i<l; i++){ 

            var ch = s.charAt(i);    
            if (ch == '&'){ 

				var semicolonIndex = s.indexOf(';', i+1);                   

            if (semicolonIndex > 0){ 

                        var entity = s.substring(i + 1, semicolonIndex); 

                        if (entity.length > 1 && entity.charAt(0) == '#'){ 

                              if (entity.charAt(1) == 'x' || entity.charAt(1) == 'X') 

                                    ch = String.fromCharCode(eval('0'+entity.substring(1))); 

                              else 

                                    ch = String.fromCharCode(eval(entity.substring(1))); 

                        } 

                    else 

                      { 

								switch (entity){ 
									case 'quot': ch = String.fromCharCode(0x0022); break; 
									case 'amp': ch = String.fromCharCode(0x0026); break; 
									case 'lt': ch = String.fromCharCode(0x003c); break; 
									case 'gt': ch = String.fromCharCode(0x003e); break; 
									case 'nbsp': ch = String.fromCharCode(0x00a0); break; 
									case 'iexcl': ch = String.fromCharCode(0x00a1); break; 
									case 'cent': ch = String.fromCharCode(0x00a2); break; 
									case 'pound': ch = String.fromCharCode(0x00a3); break;
									case 'curren': ch = String.fromCharCode(0x00a4); break;
									case 'yen': ch = String.fromCharCode(0x00a5); break; 
									case 'brvbar': ch = String.fromCharCode(0x00a6); break;
									case 'sect': ch = String.fromCharCode(0x00a7); break; 
									case 'uml': ch = String.fromCharCode(0x00a8); break; 
									case 'copy': ch = String.fromCharCode(0x00a9); break;
									case 'ordf': ch = String.fromCharCode(0x00aa); break;
									case 'laquo': ch = String.fromCharCode(0x00ab); break;
									case 'not': ch = String.fromCharCode(0x00ac); break; 
									case 'shy': ch = String.fromCharCode(0x00ad); break; 
									case 'reg': ch = String.fromCharCode(0x00ae); break; 
									case 'macr': ch = String.fromCharCode(0x00af); break;
									case 'deg': ch = String.fromCharCode(0x00b0); break; 
									case 'plusmn': ch = String.fromCharCode(0x00b1); break;
									case 'sup2': ch = String.fromCharCode(0x00b2); break; 
									case 'sup3': ch = String.fromCharCode(0x00b3); break; 
									case 'acute': ch = String.fromCharCode(0x00b4); break;
									case 'micro': ch = String.fromCharCode(0x00b5); break;
									case 'para': ch = String.fromCharCode(0x00b6); break; 
									case 'middot': ch = String.fromCharCode(0x00b7); break;
									case 'cedil': ch = String.fromCharCode(0x00b8); break; 
									case 'sup1': ch = String.fromCharCode(0x00b9); break; 
									case 'ordm': ch = String.fromCharCode(0x00ba); break; 
									case 'raquo': ch = String.fromCharCode(0x00bb); break;
									case 'frac14': ch = String.fromCharCode(0x00bc); break; 
									case 'frac12': ch = String.fromCharCode(0x00bd); break; 
									case 'frac34': ch = String.fromCharCode(0x00be); break; 
									case 'iquest': ch = String.fromCharCode(0x00bf); break; 
									case 'Agrave': ch = String.fromCharCode(0x00c0); break; 
									case 'Aacute': ch = String.fromCharCode(0x00c1); break; 
									case 'Acirc': ch = String.fromCharCode(0x00c2); break; 
									case 'Atilde': ch = String.fromCharCode(0x00c3); break;
									case 'Auml': ch = String.fromCharCode(0x00c4); break; 
									case 'Aring': ch = String.fromCharCode(0x00c5); break;
									case 'AElig': ch = String.fromCharCode(0x00c6); break;
									case 'Ccedil': ch = String.fromCharCode(0x00c7); break;
									case 'Egrave': ch = String.fromCharCode(0x00c8); break;
									case 'Eacute': ch = String.fromCharCode(0x00c9); break;
									case 'Ecirc': ch = String.fromCharCode(0x00ca); break; 
									case 'Euml': ch = String.fromCharCode(0x00cb); break; 
									case 'Igrave': ch = String.fromCharCode(0x00cc); break;
									case 'Iacute': ch = String.fromCharCode(0x00cd); break;
									case 'Icirc': ch = String.fromCharCode(0x00ce ); break;
									case 'Iuml': ch = String.fromCharCode(0x00cf); break; 
									case 'ETH': ch = String.fromCharCode(0x00d0); break; 
									case 'Ntilde': ch = String.fromCharCode(0x00d1); break;
									case 'Ograve': ch = String.fromCharCode(0x00d2); break;
									case 'Oacute': ch = String.fromCharCode(0x00d3); break;
									case 'Ocirc': ch = String.fromCharCode(0x00d4); break; 
									case 'Otilde': ch = String.fromCharCode(0x00d5); break;
									case 'Ouml': ch = String.fromCharCode(0x00d6); break; 
									case 'times': ch = String.fromCharCode(0x00d7); break;
									case 'Oslash': ch = String.fromCharCode(0x00d8); break;
									case 'Ugrave': ch = String.fromCharCode(0x00d9); break;
									case 'Uacute': ch = String.fromCharCode(0x00da); break;
									case 'Ucirc': ch = String.fromCharCode(0x00db); break; 
									case 'Uuml': ch = String.fromCharCode(0x00dc); break; 
									case 'Yacute': ch = String.fromCharCode(0x00dd); break;
									case 'THORN': ch = String.fromCharCode(0x00de); break; 
									case 'szlig': ch = String.fromCharCode(0x00df); break; 
									case 'agrave': ch = String.fromCharCode(0x00e0); break;
									case 'aacute': ch = String.fromCharCode(0x00e1); break;
									case 'acirc': ch = String.fromCharCode(0x00e2); break; 
									case 'atilde': ch = String.fromCharCode(0x00e3); break;
									case 'auml': ch = String.fromCharCode(0x00e4); break; 
									case 'aring': ch = String.fromCharCode(0x00e5); break;
									case 'aelig': ch = String.fromCharCode(0x00e6); break;
									case 'ccedil': ch = String.fromCharCode(0x00e7); break;
									case 'egrave': ch = String.fromCharCode(0x00e8); break;
									case 'eacute': ch = String.fromCharCode(0x00e9); break;
									case 'ecirc': ch = String.fromCharCode(0x00ea); break; 
									case 'euml': ch = String.fromCharCode(0x00eb); break; 
									case 'igrave': ch = String.fromCharCode(0x00ec); break;
									case 'iacute': ch = String.fromCharCode(0x00ed); break;
									case 'icirc': ch = String.fromCharCode(0x00ee); break; 
									case 'iuml': ch = String.fromCharCode(0x00ef); break; 
									case 'eth': ch = String.fromCharCode(0x00f0); break; 
									case 'ntilde': ch = String.fromCharCode(0x00f1); break;
									case 'ograve': ch = String.fromCharCode(0x00f2); break;
									case 'oacute': ch = String.fromCharCode(0x00f3); break;
									case 'ocirc': ch = String.fromCharCode(0x00f4); break; 
									case 'otilde': ch = String.fromCharCode(0x00f5); break; 
									case 'ouml': ch = String.fromCharCode(0x00f6); break; 
									case 'divide': ch = String.fromCharCode(0x00f7); break;
									case 'oslash': ch = String.fromCharCode(0x00f8); break;
									case 'ugrave': ch = String.fromCharCode(0x00f9); break;
									case 'uacute': ch = String.fromCharCode(0x00fa); break;
									case 'ucirc': ch = String.fromCharCode(0x00fb); break; 
									case 'uuml': ch = String.fromCharCode(0x00fc); break; 
									case 'yacute': ch = String.fromCharCode(0x00fd); break;
									case 'thorn': ch = String.fromCharCode(0x00fe); break; 
									case 'yuml': ch = String.fromCharCode(0x00ff); break; 
									case 'OElig': ch = String.fromCharCode(0x0152); break;
									case 'oelig': ch = String.fromCharCode(0x0153); break;
									case 'Scaron': ch = String.fromCharCode(0x0160); break;
									case 'scaron': ch = String.fromCharCode(0x0161); break;
									case 'Yuml': ch = String.fromCharCode(0x0178); break; 
									case 'fnof': ch = String.fromCharCode(0x0192); break; 
									case 'circ': ch = String.fromCharCode(0x02c6); break; 
									case 'tilde': ch = String.fromCharCode(0x02dc); break;
									case 'Alpha': ch = String.fromCharCode(0x0391); break;
									case 'Beta': ch = String.fromCharCode(0x0392); break; 
									case 'Gamma': ch = String.fromCharCode(0x0393); break;
									case 'Delta': ch = String.fromCharCode(0x0394); break;
									case 'Epsilon': ch = String.fromCharCode(0x0395); break;
									case 'Zeta': ch = String.fromCharCode(0x0396); break; 
									case 'Eta': ch = String.fromCharCode(0x0397); break; 
									case 'Theta': ch = String.fromCharCode(0x0398); break;
									case 'Iota': ch = String.fromCharCode(0x0399); break; 
									case 'Kappa': ch = String.fromCharCode(0x039a); break;
									case 'Lambda': ch = String.fromCharCode(0x039b); break;
									case 'Mu': ch = String.fromCharCode(0x039c); break; 
									case 'Nu': ch = String.fromCharCode(0x039d); break; 
									case 'Xi': ch = String.fromCharCode(0x039e); break; 
									case 'Omicron': ch = String.fromCharCode(0x039f); break;
									case 'Pi': ch = String.fromCharCode(0x03a0); break; 
									case ' Rho ': ch = String.fromCharCode(0x03a1); break;
									case 'Sigma': ch = String.fromCharCode(0x03a3); break;
									case 'Tau': ch = String.fromCharCode(0x03a4); break; 
									case 'Upsilon': ch = String.fromCharCode(0x03a5); break;
									case 'Phi': ch = String.fromCharCode(0x03a6); break; 
									case 'Chi': ch = String.fromCharCode(0x03a7); break; 
									case 'Psi': ch = String.fromCharCode(0x03a8); break; 
									case 'Omega': ch = String.fromCharCode(0x03a9); break;
									case 'alpha': ch = String.fromCharCode(0x03b1); break;
									case 'beta': ch = String.fromCharCode(0x03b2); break; 
									case 'gamma': ch = String.fromCharCode(0x03b3); break;
									case 'delta': ch = String.fromCharCode(0x03b4); break;
									case 'epsilon': ch = String.fromCharCode(0x03b5); break;
									case 'zeta': ch = String.fromCharCode(0x03b6); break; 
									case 'eta': ch = String.fromCharCode(0x03b7); break; 
									case 'theta': ch = String.fromCharCode(0x03b8); break;
									case 'iota': ch = String.fromCharCode(0x03b9); break; 
									case 'kappa': ch = String.fromCharCode(0x03ba); break;
									case 'lambda': ch = String.fromCharCode(0x03bb); break;
									case 'mu': ch = String.fromCharCode(0x03bc); break; 
									case 'nu': ch = String.fromCharCode(0x03bd); break; 
									case 'xi': ch = String.fromCharCode(0x03be); break; 
									case 'omicron': ch = String.fromCharCode(0x03bf); break;
									case 'pi': ch = String.fromCharCode(0x03c0); break; 
									case 'rho': ch = String.fromCharCode(0x03c1); break; 
									case 'sigmaf': ch = String.fromCharCode(0x03c2); break;
									case 'sigma': ch = String.fromCharCode(0x03c3); break; 
									case 'tau': ch = String.fromCharCode(0x03c4); break; 
									case 'upsilon': ch = String.fromCharCode(0x03c5); break;
									case 'phi': ch = String.fromCharCode(0x03c6); break; 
									case 'chi': ch = String.fromCharCode(0x03c7); break; 
									case 'psi': ch = String.fromCharCode(0x03c8); break; 
									case 'omega': ch = String.fromCharCode(0x03c9); break;
									case 'thetasym': ch = String.fromCharCode(0x03d1); break;
									case 'upsih': ch = String.fromCharCode(0x03d2); break; 
									case 'piv': ch = String.fromCharCode(0x03d6); break; 
									case 'ensp': ch = String.fromCharCode(0x2002); break;
									case 'emsp': ch = String.fromCharCode(0x2003); break;
									case 'thinsp': ch = String.fromCharCode(0x2009); break;
									case 'zwnj': ch = String.fromCharCode(0x200c); break; 
									case 'zwj': ch = String.fromCharCode(0x200d); break; 
									case 'lrm': ch = String.fromCharCode(0x200e); break; 
									case 'rlm': ch = String.fromCharCode(0x200f); break; 
									case 'ndash': ch = String.fromCharCode(0x2013); break;
									case 'mdash': ch = String.fromCharCode(0x2014); break;
									case 'lsquo': ch = String.fromCharCode(0x2018); break;
									case 'rsquo': ch = String.fromCharCode(0x2019); break;
									case 'sbquo': ch = String.fromCharCode(0x201a); break;
									case 'ldquo': ch = String.fromCharCode(0x201c); break;
									case 'rdquo': ch = String.fromCharCode(0x201d); break;
									case 'bdquo': ch = String.fromCharCode(0x201e); break;
									case 'dagger': ch = String.fromCharCode(0x2020); break;
									case 'Dagger': ch = String.fromCharCode(0x2021); break;
									case 'bull': ch = String.fromCharCode(0x2022); break; 
									case 'hellip': ch = String.fromCharCode(0x2026); break;
									case 'permil': ch = String.fromCharCode(0x2030); break;
									case 'prime': ch = String.fromCharCode(0x2032); break; 
									case 'Prime': ch = String.fromCharCode(0x2033); break; 
									case 'lsaquo': ch = String.fromCharCode(0x2039); break;
									case 'rsaquo': ch = String.fromCharCode(0x203a); break;
									case 'oline': ch = String.fromCharCode(0x203e); break; 
									case 'frasl': ch = String.fromCharCode(0x2044); break; 
									case 'euro': ch = String.fromCharCode(0x20ac); break; 
									case 'image': ch = String.fromCharCode(0x2111); break;
									case 'weierp': ch = String.fromCharCode(0x2118); break;
									case 'real': ch = String.fromCharCode(0x211c); break; 
									case 'trade': ch = String.fromCharCode(0x2122); break;
									case 'alefsym': ch = String.fromCharCode(0x2135); break; 
									case 'larr': ch = String.fromCharCode(0x2190); break; 
									case 'uarr': ch = String.fromCharCode(0x2191); break; 
									case 'rarr': ch = String.fromCharCode(0x2192); break; 
									case 'darr': ch = String.fromCharCode(0x2193); break; 
									case 'harr': ch = String.fromCharCode(0x2194); break; 
									case 'crarr': ch = String.fromCharCode(0x21b5); break; 
									case 'lArr': ch = String.fromCharCode(0x21d0); break; 
									case 'uArr': ch = String.fromCharCode(0x21d1); break; 
									case 'rArr': ch = String.fromCharCode(0x21d2); break; 
									case 'dArr': ch = String.fromCharCode(0x21d3); break; 
									case 'hArr': ch = String.fromCharCode(0x21d4); break; 
									case 'forall': ch = String.fromCharCode(0x2200); break;
									case 'part': ch = String.fromCharCode(0x2202); break; 
									case 'exist': ch = String.fromCharCode(0x2203); break;
									case 'empty': ch = String.fromCharCode(0x2205); break;
									case 'nabla': ch = String.fromCharCode(0x2207); break;
									case 'isin': ch = String.fromCharCode(0x2208); break; 
									case 'notin': ch = String.fromCharCode(0x2209); break;
									case 'ni': ch = String.fromCharCode(0x220b); break; 
									case 'prod': ch = String.fromCharCode(0x220f); break;
									case 'sum': ch = String.fromCharCode(0x2211); break; 
									case 'minus': ch = String.fromCharCode(0x2212); break;
									case 'lowast': ch = String.fromCharCode(0x2217); break;
									case 'radic': ch = String.fromCharCode(0x221a); break; 
									case 'prop': ch = String.fromCharCode(0x221d); break; 
									case 'infin': ch = String.fromCharCode(0x221e); break;
									case 'ang': ch = String.fromCharCode(0x2220); break; 
									case 'and': ch = String.fromCharCode(0x2227); break; 
									case 'or': ch = String.fromCharCode(0x2228); break; 
									case 'cap': ch = String.fromCharCode(0x2229); break;
									case 'cup': ch = String.fromCharCode(0x222a); break;
									case 'int': ch = String.fromCharCode(0x222b); break;
									case 'there4': ch = String.fromCharCode(0x2234); break;
									case 'sim': ch = String.fromCharCode(0x223c); break; 
									case 'cong': ch = String.fromCharCode(0x2245); break;
									case 'asymp': ch = String.fromCharCode(0x2248); break;
									case 'ne': ch = String.fromCharCode(0x2260); break; 
									case 'equiv': ch = String.fromCharCode(0x2261); break;
									case 'le': ch = String.fromCharCode(0x2264); break; 
									case 'ge': ch = String.fromCharCode(0x2265); break; 
									case 'sub': ch = String.fromCharCode(0x2282); break;
									case 'sup': ch = String.fromCharCode(0x2283); break;
									case 'nsub': ch = String.fromCharCode(0x2284); break;
									case 'sube': ch = String.fromCharCode(0x2286); break;
									case 'supe': ch = String.fromCharCode(0x2287); break;
									case 'oplus': ch = String.fromCharCode(0x2295); break;
									case 'otimes': ch = String.fromCharCode(0x2297); break;
									case 'perp': ch = String.fromCharCode(0x22a5); break; 
									case 'sdot': ch = String.fromCharCode(0x22c5); break; 
									case 'lceil': ch = String.fromCharCode(0x2308); break;
									case 'rceil': ch = String.fromCharCode(0x2309); break;
									case 'lfloor': ch = String.fromCharCode(0x230a); break; 
									case 'rfloor': ch = String.fromCharCode(0x230b); break; 
									case 'lang': ch = String.fromCharCode(0x2329); break; 
									case 'rang': ch = String.fromCharCode(0x232a); break; 
									case 'loz': ch = String.fromCharCode(0x25ca); break; 
									case 'spades': ch = String.fromCharCode(0x2660); break;
									case 'clubs': ch = String.fromCharCode(0x2663); break; 
									case 'hearts': ch = String.fromCharCode(0x2665); break;
									case 'diams': ch = String.fromCharCode(0x2666); break; 
									default: ch = ''; break; 

                              } 

                        } 

                        i = semicolonIndex; 

                  } 

            } 

            out += ch; 

      } 

      return out; 

} 
//---------------------------------------------------------------------------------------------------------------
//APPLICATION FUNCTIONS THAT ARE NOT PART OF THE WUC SUITE:
//---------------------------------------------------------------------------------------------------------------
function IsPassword(value){
    value = Trim(value).toLowerCase();
    
    if (value.length < 6 || value.length > 10) return false;

    for (i = 0; i < value.length; i++){
        if (value.substr(i, 1) < "a" || value.substr(i, 1) > "z"){
            switch (value.substr(i, 1)){
                case "0": case "1": case "2": case "3": case "4": case "5":
                case "6": case "7": case "8": case "9":
                    //Continue checking:
                    break;
                default:
                    return false;
            }
        }
    }
    return true;
}
//---------------------------------------------------------------------------------------------------------------
function IsAlphaNumeric(value){
    value = Trim(value).toLowerCase();
    
    for (i = 0; i < value.length; i++){
        if (value.substr(i, 1) < "a" || value.substr(i, 1) > "z"){
            switch (value.substr(i, 1)){
                case "0": case "1": case "2": case "3": case "4": case "5":
                case "6": case "7": case "8": case "9":
                    //Continue checking:
                    break;
                default:
                    return false;                     
            }
        }        
    }
    return true;
}
//---------------------------------------------------------------------------------------------------------------
function IsZipCode(value){	
	if (value == ""){
		return true;
	}
	
	if (value.length != 5 && value.length != 10){
		return false;
	}
	
	if (value.length == 5){				
		return IsInteger(value, false);	
	}
	else {		
		//Make sure the dash is in the right place:
		if (value.indexOf("-") != 5){
			return false;
		}
		//If its in the right place, then we break
		//the string up into two parts and test them:
		var partArray = value.split("-");
		if (IsInteger(partArray[0], false) == false){
			return false;
		}
		if (IsInteger(partArray[1], false) == false){
			return false;
		}
		// If we get this far, then it is valid:
		return true;			
	}				
}	
//---------------------------------------------------------------------------------------------------------------
function IsEmail(value){

	if (value == ""){
		return true;
	}	
	
    //Check for an @ symbol:    
    if (value.indexOf("@") == -1){
        return false;
    }
    //Check for more than 1 @ symbol:    
    if (value.indexOf("@") != value.lastIndexOf("@")){
        return false;
    }
    
    //Check for an . symbol after @ symbol:    
    if (value.lastIndexOf(".") < value.indexOf("@")){
        return false;
    }
    
    //Check for an empty " " string:    
    if (value.indexOf(" ") != -1){
        return false;
    }
    
    //Check for invalid symbols:
    if (value.indexOf("*") != -1){
        return false;
    }
    if (value.indexOf("%") != -1){
        return false;
    }
    if (value.indexOf(",") != -1){
        return false;
    }
    if (value.indexOf(";") != -1){
        return false;
    }
    if (value.indexOf("'") != -1){
        return false;
    }
    if (value.indexOf("\"") != -1){
        return false;
    }
    if (value.indexOf(":") != -1){
        return false;
    }
    return true;
}
//---------------------------------------------------------------------------------------------------------------
function IsCreditCardExpDateValid(expirationMonth, expirationYear){

    var dateObject = new Date();
    var currentMonth = dateObject.getMonth() + 1; 
    var currentYear = dateObject.getYear();    
    
    //Convert to int:
    expirationMonth = CInt(expirationMonth);
    expirationYear = CInt(expirationYear);    
        
    //Check the year first:
    if (expirationYear < currentYear) return false;
    
    //Check the month next:
    if (expirationYear == currentYear){        
        if (expirationMonth < currentMonth) return false;
    }
    return true;
    
}
//------------------------------------------------------------------------------------
function IsCreditCardNumber(number, cardType){

    //Remove "-" and " " from the Card Number:
    var cardNumber = Replace(Replace(
        Trim(number), "-", ""), " ", "");
    if (cardNumber == ""){
        alert("Card Number is required.");
        return false;
    }
    if (!IsInteger(cardNumber)){
        alert("Card Number must be a valid number, please do not use any " +
                "characters other than 0-9");
        return false;
    }
    //Check length:
    if (cardType.toLowerCase() == "american express"){
        if (cardNumber.length != 15){
            alert("This card type requires a 15 digit card number.");
            return false;
        }
    }
    else {
        if (cardNumber.length != 16){
            alert("This card type requires a 16 digit card number.");
            return false;
        }
    }

    //Check cardNumber to make sure its first digit(s) matches
    //its card type:
    switch (cardType.toLowerCase()){
        case "american express":
            if (cardNumber.substr(0,2) != "37"){
                alert("The card number is invalid. American Express cards start with [37].");
                return false;
            }
            break;
        case "visa":
            if (cardNumber.substr(0,1) != "4"){
                alert("The card number is invalid. Visa credit cards start with [4].");
                return false;
            }
            break;
        case "mastercard":
            if (cardNumber.substr(0,1) != "5"){
                alert("The card number is invalid. Mastercard credit cards start with [5].");
                return false;
            }
            break;
        case "discover":
            if (cardNumber.substr(0,2) != "60"){
                alert("The card number is invalid. Discover credit cards start with [60].");
                return false;
            }
            break;
    }
    
    //If we made it to this point, then the card number passed all validations, so return true:
    return true;
}
//------------------------------------------------------------------------------------
