/*
 * 14.09.2003 ralf kramer <rk@belisar.de>
 * A collection of functions for validating html form contents
 *
 */


/**
 * Throws an alert if any of the mandatory field is empty
 *
 * The param mandatory_fields contains the id's of all mandatory fields.
 *
 * @author  Ralf Kramer
 * @param   string  mandatory_fields:  a list of mandatory form fields seperated by a whitespace
 * @return  boolean
 */
function hasEmptyFields( mandatory_fields, message )
{
    field_array = mandatory_fields.split( " ");
    empty_fields = "";
    for( i = 0; i < field_array.length; i++ )
    {
        var field = document.getElementById( field_array[i] );
        if( field.value == "" )
        {
            field.style.border = '1px dotted red';
            empty_fields = empty_fields + field_array[i];
        }
        else
            field.style.border = '1px dotted green';
    }

    if( empty_fields.length > 2 )
    {
        alert( message );
        return true;
    }

    return false;
}

function hasInvalidPasswords()
{
    var password            = document.getElementById( 'password' );
    var confirm_password    = document.getElementById( 'confirm_password' );

    if( password.value != confirm_password.value  )
    {
        password.style.border           = '1px dotted red';
        confirm_password.style.border   = '1px dotted red';

        alert( 'Die Passwörter stimmen nicht überein' );
        return true;
    }

    return false;

}

function isNumber( element )
{
    element = document.getElementById( element );

    if( element.value.match( '^[0-9]*$' ) == null )
    {
        this.isShown = true
        alert( 'Bitte geben Sie hier nur Zahlen ein.\n Andere Zeichen oder Buchstaben können nicht verarbeitet werden' );

        element.style.border    = '1px dotted red';
        element.value           = '';
        element.focus();
        return true;
    }
    else
    {
        if( this.isShown )
            msisdn.style.border = '1px dotted green';
        return false;
    }
}

function redirect( url )
{
    window.location.href = url;
}

function confirmDelete( url, question )
{
    if( confirm( question ) )
        window.location.href = url;
}

/**
 * Counts how many chars are remaining to enter.
 *
 * Example of using:
 * <script language="JavaScript" type="text/javascript" src="chars_remain.js"></script>
 * Chars remaining: <span id="chars">128</span><br>
 * <textarea name="text" id="text" onKeyUp="countCharsRemaining(128, 'text', 'chars');"></textarea>
 *
 * @return  void
 * @param   int     max_chars       The maximum quantity of chars allowed to enter
 * @param   string  text_field      The id of the form field with the text
 * @param   string  counter_id      The id of the counter tag
 */
function countCharsRemaining( max_chars, text_field, counter_id )
{
    var newCounterValue = max_chars - document.getElementById(text_field).value.length;

    if (newCounterValue >= 0)
    {
        document.getElementById(counter_id).innerHTML = newCounterValue;
    }
    else
    {
        document.getElementById(text_field).value = document.getElementById(text_field).value.substr(0,max_chars);
        document.getElementById(counter_id).innerHTML = '0';
    }
}

function isInvalidSearchRequest(what, where)
{
    if( what == $F('what') && where == $F('where') )
        return true;

    if( "" == $F('what') && "" == $F('where') )
        return true;

    return false;
}



var messages = {
	followingErrorsOccured: "", 
	invalidName: "", 
	invalidEmail: "", 
	invalidComment: "", 
	invalidCaptcha: "", 
	invalidWebsite: "" 
}