function _CF_onError(form_object, input_object, object_value, error_message)
    {
        alert(error_message);
        return false;   
    }



function _CF_hasValue(obj, obj_type)
    {
    if (obj_type == "TEXT" || obj_type == "PASSWORD")
        {
        if (obj.value.length == 0) 
                return false;
        else 
                return true;
        }
    else if (obj_type == "SELECT")
        {
        for (i=0; i < obj.length; i++)
                {
                if (obj.options[i].selected)
                        return true;
                }

        return false;   
        }
    else if (obj_type == "SINGLE_VALUE_RADIO" || obj_type == "SINGLE_VALUE_CHECKBOX")
        {

                if (obj.checked)
                        return true;
                else
                return false;   
        }
    else if (obj_type == "RADIO" || obj_type == "CHECKBOX")
        {

        for (i=0; i < obj.length; i++)
                {
                if (obj[i].checked)
                        return true;
                }

        return false;   
        }
        }


function  _CF_checktop_login(_CF_this)

    {

    if  (!_CF_hasValue(_CF_this.USERID, "TEXT" )) 

        {

        if  (!_CF_onError(_CF_this, _CF_this.USERID, _CF_this.USERID.value, "You must enter your Username"))

            {

            return false; 

            }

        }


    if  (!_CF_hasValue(_CF_this.PASSWORD, "PASSWORD" )) 

        {

        if  (!_CF_onError(_CF_this, _CF_this.PASSWORD, _CF_this.PASSWORD.value, "You must enter your Password"))

            {

            return false; 

            }

        }


    return true;

    }