/* 
    dotmarketing formchecker created 03/05/02 by Ben Barreth

*-------------------------------------------------------------*
    Altered 10/16/2002 by Will
    Modified by monkeys on 3/25/2003
    
    Incorporated Steve's util js functions.
    Added a DOM automatic form checker.  This works for 5+ browsers.
    The checker iterates over all input boxes  on the page and looks 
    for an attribute called "required"  All you have to do is include the form_validation.js in 
    your page:
    
        <SCRIPT LANGUAGE="JavaScript" TYPE="text/javascript" src='/js/form_validation.js'></SCRIPT>

    and put the "checkForm()" method in the doSubmit attribute in your form:
    
        <form name="myForm" action="/doSomthing" onSubmit="return checkForm();">

    Required can have three values (text | date | email | number).  The checker
    validates the field based on the required attribute. 

        // requires the values fit the required style
        <input type="text" name="myFirstName" value="" required="text" />
        <input type="text" name="emailAddress" value="" required="email" />
        <input type="text" name="DOB" value="" required="date" />
        <input type="text" name="myIDNumber" value="" required="number" />
		
        // requires the length to be 9
        <input type="text" name="myLastName" value="" required="text" pretty="My Last Name" requiredLength="9" />
        
        // require a radio button be checked
        <input type="radio" name="myGender" value="Male" required="radio" pretty="My Gender">
        <input type="radio" name="myGender" value="Female">
        
        // require 2 out of 4 checkboxes checked
        <input type="checkbox" name="favoriteFruit" value="Male" required="radio" pretty="My Gender" requiredNumber="2">
        <input type="checkbox" name="favoriteFruit" value="Apple">
        <input type="checkbox" name="favoriteFruit" value="Orange">
        <input type="checkbox" name="favoriteFruit" value="Female">
        
    	Feel free to add any other checks as you see fit.


*/




function checkForm(form){

    if (form) {
        var elements = form.elements;
        var inputs = new Array();
        var selects = new Array();
        var textarea = new Array();
	
        for (k=0;k<elements.length;k++) {
            if (elements[k].tagName == "INPUT") {
                inputs[inputs.length] = elements[k];
            } else if (elements[k].tagName == "SELECT") {
                selects[selects.length] = elements[k];
            }
            else if (elements[k].tagName == "TEXTAREA") {
                textarea[textarea.length] = elements[k];
		
            }
        }
    
    }
    else {
        inputs = document.getElementsByTagName("input");
        selects = document.getElementsByTagName("select");
        textarea = document.getElementsByTagName("textarea");
    }
	
    for(i =0; i<inputs.length ; i++){
        var required = inputs[i].getAttribute("required");
        
        if(required != undefined && required == "radio"){
        	
            fieldName = inputs[i].name;
            prettyText = (inputs[i].getAttribute("pretty")!= undefined) ? inputs[i].getAttribute("pretty") : inputs[i].name;
            radios = eval("document." + inputs[i].form.name + "." + fieldName);
            radiosLength = radios.length;
            if(!radioValid(radios,radiosLength,prettyText)){
                return false;
            }
       		
        }
        else if(required != undefined && required == "checkbox"){
        	
            requiredNumber = (inputs[i].getAttribute("requiredNumber")!= undefined) ? inputs[i].getAttribute("requiredNumber") : 1;
            fieldName = inputs[i].name;
            prettyText = (inputs[i].getAttribute("pretty")!= undefined) ? inputs[i].getAttribute("pretty") : inputs[i].name;
            checkboxes = eval("document." + inputs[i].form.name + "." + fieldName);
            checkboxesLength = checkboxes.length;
            if(!checkboxValid(checkboxes,checkboxesLength,requiredNumber,prettyText)){
                return false;
            }
       		
        }
        else if(required != undefined){


            fieldName = (inputs[i].getAttribute("pretty")!= undefined) ? inputs[i].getAttribute("pretty") : inputs[i].name;
            requiredLength = (inputs[i].getAttribute("requiredLength")!= undefined) ? inputs[i].getAttribute("requiredLength") : 1;

            if(! lengthValid(inputs[i], requiredLength, fieldName)){
                return false;
            }
            if(required == "date" && ! dateValid(inputs[i], fieldName)){
                return false;

            }
            if(required == "email" && ! emailValid(inputs[i], fieldName)){
                return false;
            }
            if(required == "number" && ! numberValid(inputs[i], fieldName)){
                return false;
            }
        }
		
        var validationFunction = inputs[i].getAttribute("validationFunction");
        var retValue = false;
        if(validationFunction != undefined) {
            eval("retValue = " + validationFunction);
            if(!retValue) {
                return false;
            }
        }
    }




    /*this is to check the textarea*/
    for(i =0; i<textarea.length ; i++){
        required = textarea[i].getAttribute("required");
        if(required != undefined)
        {
            fieldName = (textarea[i].getAttribute("pretty")!= undefined) ? textarea[i].getAttribute("pretty") : textarea[i].name;
            requiredLength = (textarea[i].getAttribute("requiredLength")!= undefined) ? textarea[i].getAttribute("requiredLength") : 1;
            if(! lengthValidText(textarea[i], requiredLength , fieldName))
            {
                return false;
            }
        }
        var validationFunction = textarea[i].getAttribute("validationFunction");
        var retValue = false;
        if(validationFunction != undefined) {
            eval("retValue = " + validationFunction);
            if(!retValue) {
                return false;
            }
        }
    }
	
	
	
	
	
	
    
    for(i =0; i<selects.length ; i++){
        required = selects[i].getAttribute("required");

        if(required != undefined){


            fieldName = (selects[i].getAttribute("pretty")!= undefined) ? selects[i].getAttribute("pretty") : selects[i].name;

            if(required == "select" && ! selectValid(selects[i], fieldName)){
                return false;
            }
        }
		
        var validationFunction = selects[i].getAttribute("validationFunction");
        var retValue = false;
        if(validationFunction != undefined) {
            eval("retValue = " + validationFunction);
            if(!retValue) {
                return false;
            }
        }
		
    }
    return true;

}

function checkField(formName, fieldName, prettyText, required, requiredLength){

    if(required != undefined && required == "radio"){
        radios = eval("document." + formName + "." + fieldName);
        radiosLength = radios.length;
        if(!radioValid(radios,radiosLength,prettyText)){
            return false;
        }
       		
    }
    else if(required != undefined && required == "checkbox"){
        checkboxes = eval("document." + formName + "." + fieldName);
        checkboxesLength = checkboxes.length;
        if(!checkboxValid(checkboxes,checkboxesLength,requiredLength,prettyText)){
            return false;
        }
       		
    }
    else if(required != undefined && required == "textarea"){
        textarea = eval("document." + formName + "." + fieldName);
        if(! lengthValidText(textarea, requiredLength , prettyText))
        {
            return false;
        }
    }
    else if(required != undefined && required == "select"){
        selectField = eval("document." + formName + "." + fieldName);
        if(!selectValid(selectField, prettyText)){
            return false;
        }
    }
    else if(required != undefined){

        inputField = eval("document." + formName + "." + fieldName);
        if (requiredLength > 0) {
            if(! lengthValid(inputField, requiredLength, prettyText)){
                return false;
            }
        }
        if(required == "date" && ! dateValid(inputField, prettyText)){
            return false;
        }
        if(required == "email" && ! emailValid(inputField, prettyText)){
            return false;
        }
        if(required == "number" && ! numberValid(inputField, prettyText)){
            return false;
        }
    }
	
    return true;

}


//function to validate US dates
function dateValid(element, text){

    good = true;
    dar =element.value.split("/");
    if(dar.length < 3){
        good = false;
    }
    if(isNaN(parseInt(dar[0], 10)) || isNaN(parseInt(dar[1], 10)) || isNaN(parseInt(dar[2], 10))){
        good = false;
    }
    month = parseInt(dar[0], 10);
    day = parseInt(dar[1], 10);
    year = parseInt(dar[2], 10);
    if(month< 1 || month > 12){
        good = false;
    }
    else if(day < 1 || day > 31){
        good = false;
    }
    else if(year < 1900 || year > 2100){
        good = false;
    }
    else if(
        (year % 4 != 0 && day > 28 && month == 2) || 	(month == 4 || month ==6 || month == 9 || month == 11) && day > 30 	|| (year % 4 == 0 && day > 29 && month == 2)){
        good = false;
    }
    if(! good){
        alert( text + " ist kein korrektes Datum. Bitte korrigieren Sie die Eingabe.");
        kgst.Tools.highlightInvalidElement(element);
        element.focus();
        return false;
    }
    return true;
}





//function to validate by length	

function lengthValid(element, len, text) {

    text = Trim(text);

    if (element.value.length < len)
    {
        alert("Bitte geben Sie eine(n) " + text + " an.");
        kgst.Tools.highlightInvalidElement(element);
        element.focus();
        return false;
    }else{
        return true;
    }
}

//function to validate select drop-downs
function selectValid(element, text) {
    text = Trim(text);
    if (element[0].selected)
    {
        alert("Bitte wählen Sie eine der Möglichkeiten für " + text + " aus.");
        kgst.Tools.highlightInvalidElement(element);
        element.focus();
        return false;
    }else{
        return true;
    }
}

//function to validate numerical fields
function numberValid(element, text) {
    text = Trim(text);
    if (isNaN(element.value))
    {
        alert("Bitte geben Sie eine korrekte " + text + " ein.");
        kgst.Tools.highlightInvalidElement(element);
        element.focus();
        return false;
    }else{
        return true;
    }
}

//function to validate email
function emailValid(element, text) {
    text = Trim(text);
    good = true;
    if(element.value.length < 5)
    {
        good = false;
    }

    if(element.value.indexOf("@") < 1 || element.value.lastIndexOf("@")  > element.value.length - 3 )
    {
        good = false;
    }
    if(element.value.indexOf(".") == -1 || element.value.lastIndexOf(".")  > element.value.length - 3 )
    {
        good = false;
    }
    if(element.value.lastIndexOf("@") !=  element.value.indexOf("@") )
    {
        good = false;
    }
    if(element.value.lastIndexOf("@") !=  element.value.indexOf("@") )
    {
        good = false;
    }
    if(element.value.lastIndexOf("@") >= element.value.lastIndexOf(".")-1 )
    {
        good = false;
    }


    if(!good){
        alert("Bitte geben Sie eine korrekte " + text + " an.");
        kgst.Tools.highlightInvalidElement(element);
        element.focus();
        return false;
    }
    return true;

}

//function to validate at least 1 radio button is checked	
function radioValid(element, radios, text) {
    text = Trim(text);
    radios=radios-1;
    var varChecked=false;
    for(var radiostoCheck=0;radiostoCheck<=radios;radiostoCheck++)
    {
        if(element[radiostoCheck].checked)
        {
            varChecked=true;
        }
    }
    if (varChecked==false)
    {
        alert("Please select " + text + ".");
        element[0].focus();
        return false;
    }else{
        return true;
    }
}


//function to validate at a given number of checkboxes are checked	
function checkboxValid(element, checkboxesLength, requiredNumber,text) {
    text = Trim(text);
    checkboxesLength=checkboxesLength-1;
    var varChecked=0;
    for(var checkboxestoCheck=0;checkboxestoCheck<=checkboxesLength;checkboxestoCheck++)
    {
        if(element[checkboxestoCheck].checked)
        {
            varChecked++;
        }
    }
    if (varChecked < requiredNumber)
    {
        alert("Please select at least " + requiredNumber + " " + text + ".");
        element[0].focus();
        return false;
    }else{
        return true;
    }
}

//function to validate "other box" is not empty if checked	
function otherboxValid(otherradio,otherfield,len,text) {
    text = Trim(text);
    if (otherradio.checked && (otherfield.value.length<len))
    {
        alert("Please specify the " + text + ".");
        otherfield.focus();
        return false;
    }else{
        return true;
    }
}

//function to validate radio checked if checkbox checked	
function checkboxRadio(checkfield, radiofield, radios, text) {
    text = Trim(text);
    if(checkfield.checked)
    {
        radioValid(radiofield, radios, text);
    }
}





/*
==================================================================
LTrim(string) : Returns a copy of a string without leading spaces.
==================================================================
*/
function LTrim(str)
/*
   PURPOSE: Remove leading blanks from our string.
   IN: str - the string we want to LTrim
*/
{
    var whitespace = new String(" \t\n\r");

    var s = new String(str);

    if (whitespace.indexOf(s.charAt(0)) != -1) {
        // We have a string with leading blank(s)...

        var j=0, i = s.length;

        // Iterate from the far left of string until we
        // don't have any more whitespace...
        while (j < i && whitespace.indexOf(s.charAt(j)) != -1)
            j++;

        // Get the substring from the first non-whitespace
        // character to the end of the string...
        s = s.substring(j, i);
    }
    return s;
}

/*
==================================================================
RTrim(string) : Returns a copy of a string without trailing spaces.
==================================================================
*/
function RTrim(str)
/*
   PURPOSE: Remove trailing blanks from our string.
   IN: str - the string we want to RTrim

*/
{
    // We don't want to trip JUST spaces, but also tabs,
    // line feeds, etc.  Add anything else you want to
    // "trim" here in Whitespace
    var whitespace = new String(" \t\n\r");

    var s = new String(str);

    if (whitespace.indexOf(s.charAt(s.length-1)) != -1) {
        // We have a string with trailing blank(s)...

        var i = s.length - 1;       // Get length of string

        // Iterate from the far right of string until we
        // don't have any more whitespace...
        while (i >= 0 && whitespace.indexOf(s.charAt(i)) != -1)
            i--;


        // Get the substring from the front of the string to
        // where the last non-whitespace character is...
        s = s.substring(0, i+1);
    }

    return s;
}

/*
=============================================================
Trim(string) : Returns a copy of a string without leading or trailing spaces
=============================================================
*/
function Trim(str)
/*
   PURPOSE: Remove trailing and leading blanks from our string.
   IN: str - the string we want to Trim

   RETVAL: A Trimmed string!
*/
{
    return RTrim(LTrim(str));
}
 


/*
=============================================================
Credit Card Returns a copy of a string without leading or trailing spaces
=============================================================
*/

function isCreditCard(st) {
    if (st.length > 19)  return (false);
    sum = 0; mul = 1; l = st.length;
    for (i = 0; i < l; i++) {
        digit = st.substring(l-i-1,l-i);
        tproduct = parseInt(digit ,10)*mul;
        if (tproduct >= 10)
            sum += (tproduct % 10) + 1;
        else
            sum += tproduct;
        if (mul == 1)
            mul++;
        else
            mul--;
    }
    if ((sum % 10) == 0)
        return (true);
    else
        return (false);
} 


function isVisa(cc)
{
    if (((cc.length == 16) || (cc.length == 13)) &&
        (cc.substring(0,1) == 4))
        return isCreditCard(cc);
    return false;
}  


function isMasterCard(cc)
{
    firstdig = cc.substring(0,1);
    seconddig = cc.substring(1,2);
    if ((cc.length == 16) && (firstdig == 5) &&
        ((seconddig >= 1) && (seconddig <= 5)))
        return isCreditCard(cc);
    return false;

}


function isAmericanExpress(cc)
{
    firstdig = cc.substring(0,1);
    seconddig = cc.substring(1,2);
    if ((cc.length == 15) && (firstdig == 3) &&
        ((seconddig == 4) || (seconddig == 7)))
        return isCreditCard(cc);
    return false;

} 


function isDiscover(cc)
{
    first4digs = cc.substring(0,4);
    if ((cc.length == 16) && (first4digs == "6011"))
        return isCreditCard(cc);
    return false;

} 

function isCardMatch (cardType, cardNumber)
{

    cardType = cardType.toUpperCase();
    var doesMatch = true;

    if ((cardType == "VISA") && (!isVisa(cardNumber)))
        doesMatch = false;
    if ((cardType == "MASTER CARD") && (!isMasterCard(cardNumber)))
        doesMatch = false;
    if ((cardType == "AMERICAN EXPRESS") && (!isAmericanExpress(cardNumber)))
        doesMatch = false;
    if ((cardType == "DISCOVER") && (!isDiscover(cardNumber)))
        doesMatch = false;
    return doesMatch;

}  


//function to validate by length in the textarea	
function lengthValidText(element, len, text) {
	
    text = Trim(text);
    value = Trim(element.value);
    if (value.length < len)
    {
        alert("Bitte geben Sie eine " + text + " ein.");
        element.focus();
        kgst.Tools.highlightInvalidElement(element);
        return false;
    }else{
        return true;
    }


}

//function to validate US dates
function expDateValid(element, text){
    good = true;
    dar = element.value.split("/");
    if(dar.length < 2){
        good = false;
    }
    if(isNaN(parseInt(dar[0], 10)) || isNaN(parseInt(dar[1], 10))){
        good = false;
    }
    month = parseInt(dar[0], 10);
    year = parseInt(dar[1], 10);
        
    if(month< 1 || month > 12){
        good = false;
    }
    else if(year < 0 || year > 99){
        good = false;
    }
    if(! good){
        alert( text + " is a not a valid date");
        element.focus();
        return false;
    }
    today = new Date();
    expiry = new Date(year + 2000, month);
    if (today.getTime() > expiry.getTime()) {
        alert( text + " is an expired date");
        element.focus();
        return false;
    }
    return true;
}

//function to validate String US dates
function expDateValidString(element, text){
    good = true;
    dar = element.split("/");
    if(dar.length < 2){
        good = false;
    }
    if(isNaN(parseInt(dar[0], 10)) || isNaN(parseInt(dar[1], 10))){
        good = false;
    }
    month = parseInt(dar[0], 10);
    year = parseInt(dar[1], 10);
        
    if(month< 1 || month > 12){
        good = false;
    }
    else if(year < 0 || year > 99){
        good = false;
    }
    if(! good){
        alert( text + " is a not a valid date");
        return false;
    }
    today = new Date();
    expiry = new Date(year + 2000, month);
    if (today.getTime() > expiry.getTime()) {
        alert( text + " is an expired date");
        return false;
    }
    return true;
}