// Customizing this JavaScript code requires specifying eight values.

// Value One:
// Specify the maximum number of characters the form field
// may contain. If you have no maximum, specify 0 (zero).

var MaximumCharacters = "200";

// Value Two:
// Specify the maximum number of words the form field may
// contain. If you have no maximum, specify 0 (zero).

var MaximumWords = "0";

// Value Three:
// Specify the form's name (provided by the name="_____"
// attribute in the FORM tag).

var FormName = "tellafriend";

// Value Four:
// Specify the name of the text field being monitored
// (provided by the name="_____" attribute in the
// INPUT or TEXTARE tag).

var TextFieldName = "friendemail";

// Value Five:
// Specify the field name where where is to be displayed
// the number of characters the user has typed. Make
// it blank (nothing between the quotation marks) if
// you aren't displaying the number of characters typed.

var CharactersTypedFieldName = "CharsTyped";

// Value Six:
// Specify the field name where where is to be displayed
// the number of characters left that may be typed.
// Make it blank (nothing between the quotation marks)
// if you aren't displaying the number of characters
// left.

var CharactersLeftFieldName = "CharsLeft";

// Value Seven:
// Specify the field name where where is to be displayed
// the number of words the user has typed. Make it
// blank (nothing between the quotation marks) if you
// aren't displaying the number of words typed.

var WordsTypedFieldName = "WordsTyped";

// Value Eight:
// Specify the field name where where is to be displayed
// the number of words left that may be typed. Make it
// blank (nothing between the quotation marks) if you
// aren't displaying the number of words left.

var WordsLeftFieldName = "WordsLeft";

var WordsMonitor = 0;
var MaxWords = parseInt(MaximumWords);
var MaxChars = parseInt(MaximumCharacters);
var textfield = 'document.' + FormName + '.' + TextFieldName + '.value';

function WordLengthCheck(s,l) {
    WordsMonitor = 0;
    var f = false;
    var ts = new String();
    for(var vi = 0; vi < s.length; vi++) {
        vs = s.substr(vi,1);
        if((vs >= 'A' && vs <= 'Z') || (vs >= 'a' && vs <= 'z') || (vs >= '0' && vs <= '9')) {
            if(f == false)	{
                f = true;
                WordsMonitor++;
                if((l > 0) && (WordsMonitor > l)) {
                    s = s.substring(0,ts.length);
                    vi = s.length;
                    WordsMonitor--;
                }
            }
        }
        else {
            f = false;
        }
        ts += vs;
    }
    return s;
} // function WordLengthCheck()

function CharLengthCheck(s,l) {
    if(s.length > l) {
        s = s.substring(0,l);
    }
    return s;
} // function CharLengthCheck()

function InputCharacterLengthCheck() {
    if(MaxChars <= 0) {
        return;
    }
    var currentstring = new String();
    eval('currentstring = ' + textfield);
    var currentlength = currentstring.length;
    eval('currentstring = CharLengthCheck(' + textfield + ',' + MaxChars + ')');
    if(CharactersLeftFieldName.length > 0) {
        var left = 0;
        eval('left = ' + MaxChars + ' - ' + textfield + '.length');
        if(left < 0) {
            left = 0;
        }
        eval('document.' + FormName + '.' + CharactersLeftFieldName + '.value = ' + left);
        if(currentstring.length < currentlength) {
            eval(textfield + ' = currentstring.substring(0)');
        }
    }
    if(CharactersTypedFieldName.length > 0) {
        eval('document.' + FormName + '.' + CharactersTypedFieldName + '.value = ' + textfield + '.length');
        if(currentstring.length < currentlength) {
            eval(textfield + ' = currentstring.substring(0)');
        }
    }
} // function InputCharacterLengthCheck()

function InputWordLengthCheck() {
    if(MaxWords <= 0) {
        return;
    }
    var currentstring = new String();
    eval('currentstring = ' + textfield);
    var currentlength = currentstring.length;
    eval('currentstring = WordLengthCheck(' + textfield + ',' + MaxWords + ')');
    if (WordsLeftFieldName.length > 0) {
        var left = MaxWords - WordsMonitor;
        if(left < 0) {
            left = 0;
        }
        eval('document.' + FormName + '.' + WordsLeftFieldName + '.value = ' + left);
        if(currentstring.length < currentlength) {
            eval(textfield + ' = currentstring.substring(0)');
        }
    }
    if (WordsTypedFieldName.length > 0) {
        eval('document.' + FormName + '.' + WordsTypedFieldName + '.value = ' + WordsMonitor);
        if(currentstring.length < currentlength) {
            eval(textfield + ' = currentstring.substring(0)');
        }
    }
} // function InputWordLengthCheck()

function InputLengthCheck() {
    InputCharacterLengthCheck();
    InputWordLengthCheck();
} // function InputLengthCheck()


function getObject(obj) {
    var theObj;
    if(document.all) {
        if(typeof obj=="string") {
            return document.all(obj);
        } else {
            return obj.style;
        }
    }
    if(document.getElementById) {
        if(typeof obj=="string") {
            return document.getElementById(obj);
        } else {
            return obj.style;
        }
    }
    return null;
}

function toCount(entrance,exit,text,characters) {
    var entranceObj=getObject(entrance);
    var exitObj=getObject(exit);
    var length=characters - entranceObj.value.length;
    if(length <= 0) {
        length=0;
        text='<span class="disable"> '+text+' </span>';
        entranceObj.value=entranceObj.value.substr(0,characters);
    }
    exitObj.innerHTML = text.replace("{C}",length);
}