function FormValidator() 
{
    this.Rules = new Array();
}

FormValidator.prototype.addRule = function(ruleName, params)
{
    var r = new Array();

    r['rule'] = ruleName;
    r['params'] = params;

    this.Rules.push(r);

    return true;
}

FormValidator.prototype.validateAll = function()
{
    var result = true;
    var i = 0;

    for (i = 0; i < this.Rules.length; i++)
    {
        result = result && this[this.Rules[i]['rule']](this.Rules[i]['params']);
    }
    return result;
}


    ///////////////////////////////////////////////////////////////////////////
    //
    // Rules functions

FormValidator.prototype.NotEmptyField = function(params)
{
    return null != document.getElementById(params[0]) && "" != document.getElementById(params[0]).value;
}

FormValidator.prototype.MatchRegexp = function(params)
{
    var r = new RegExp(params[1], params[2]);
    return document.getElementById(params[0]) && r.test(document.getElementById(params[0]).value);
}

FormValidator.prototype.IsEqual = function(params)
{
    return null != document.getElementById(params[0]) && 
           null != document.getElementById(params[1]) &&
           document.getElementById(params[0]).value == document.getElementById(params[1]).value;
}

FormValidator.prototype.IsInteger = function(params)
{
    return null != document.getElementById(params[0]) && NaN != parseInt(document.getElementById(params[0]).value);
}

FormValidator.prototype.IsFloat = function(params)
{
    return null != document.getElementById(params[0]) && NaN != parseFloat(document.getElementById(params[0]).value);
}

FormValidator.prototype.LongerOrEqual = function(params)
{
    return null != document.getElementById(params[0]) && params[1] <= document.getElementById(params[0]).value.length;
}

FormValidator.prototype.NotLongerThan = function(params)
{
    return null != document.getElementById(params[0]) && params[1] >= document.getElementById(params[0]).value.length;
}