function validator(){

}
validator.prototype = {
    validationData: null,
    applyFormValidation: function (data) {
        this.validationData = data;
        data.submitButton.click(this.submitClick);
        data.submitButton[0].validator = this;
        var currentField;
        for (var i = 0; i < data.fields.length; i++) {
            currentField = data.fields[i];
            if (currentField != null) {
                currentField.control[0].validator = this;
                if (currentField.type == "required") {
                    currentField.control.blur(this.requiredBlur);
                }
                else if (currentField.type == "email") {
                    currentField.type = "regex";
                    currentField.expression = /^([a-zA-Z0-9_.-])+@(([a-zA-Z0-9-])+.)+([a-zA-Z0-9]{2,4})+$/;
                    currentField.control[0].regex = currentField.expression;
                    currentField.control.blur(this.regexBlur);
                }
                else if (currentField.type == "regex") {
                    currentField.control[0].regex = currentField.expression;
                    currentField.control.blur(this.regexBlur);
                }
                if (currentField.dt) {
                    if (currentField.control.val() == '')
                        currentField.control.val(currentField.dt);
                    currentField.control[0].defaultText = currentField.dt;
                    currentField.control.focus(this.defaultFocus);
                    currentField.control.blur(this.defaultBlur);
                }
            }
        }
    },
    validate: function (vala) {
        var validationSummary = ""; //"<p class='error'>";
        var currentField;
        var isValid = true;
        var val = null;
        for (var i = 0; i < vala.validationData.fields.length; i++) {
            currentField = vala.validationData.fields[i];
            if (currentField != null) {
                val = currentField.control.val();
                if ((currentField.type == "required") && (val == "" || (currentField.control[0].defaultText && (currentField.control[0].defaultText == val)))) {
                    isValid = false;
                    validationSummary += currentField.msg /*+ "<br />"*/;
                    if (!currentField.control.parent().hasClass(vala.validationData.fieldErrorClass))
                        currentField.control.parent().addClass(vala.validationData.fieldErrorClass);
                }
                else if ((currentField.type == "regex") && (!currentField.expression.test(val))) {
                    isValid = false;
                    validationSummary += currentField.msg;
                    if (!currentField.control.parent().hasClass(vala.validationData.fieldErrorClass))
                        currentField.control.parent().addClass(vala.validationData.fieldErrorClass);
                } 
            }
        }
        //validationSummary += "</p>";
        validationSummary += '<div class="clearer"></div>';
        if (isValid) {
            vala.validationData.validationMessages.hide();
        }
        else {
            vala.validationData.validationMessages.html(validationSummary);
            vala.validationData.validationMessages.show();
        }
        return isValid;
    },
    submitClick: function (e) {
        var isValid = $(this)[0].validator.validate($(this)[0].validator);
        if (isValid)
            $(this)[0].validator.validationData.doPostback(this);
        else {
            e.preventDefault();
            return false;
        }

    },
    regexBlur: function () {
        var val = $(this).val();
        var expression = $(this)[0].regex;
        if (expression.test(val)) {
            $(this).parent().removeClass($(this)[0].validator.validationData.fieldErrorClass);
        }
        else {
            if (!$(this).parent().hasClass($(this)[0].validator.validationData.fieldErrorClass))
                $(this).parent().addClass($(this)[0].validator.validationData.fieldErrorClass);
        }
    },
    requiredBlur: function () {
        var val = $(this).val();
        if (val == "") {
            if (!$(this).parent().hasClass($(this)[0].validator.validationData.fieldErrorClass))
                $(this).parent().addClass($(this)[0].validator.validationData.fieldErrorClass);
        }
        else {
            $(this).parent().removeClass($(this)[0].validator.validationData.fieldErrorClass);
        }
    },
    defaultFocus: function () {
        var def = $(this)[0].defaultText;
        if (def == $(this).val()) {
            $(this).val('');
        }
    },
    defaultBlur: function () {
        if ($(this).val() == '')
            $(this).val($(this)[0].defaultText);
    }
}