function IsSingleSelection(select)
{
    var selcount = 0;
    if (select.tagName == "SELECT")
    {
        for(var o = 0; o < select.options.length; o++)    
        {
            var opt = select.options.item(o);
            if (opt.selected)
            {
                selcount++;
                if (opt.value == -1)
                    return false;
            }
        }
    }

    return selcount == 1;
}


function CheckFormValues(form_id)
{
    var node = document.getElementById(form_id);
    return CheckFormValuesRecurse(node);
}

function CheckFormValuesRecurse(node)
{
    if (!node)
        return true;

    for(var i = 0; i < node.childNodes.length; i++)
    {
        var childNode = node.childNodes.item(i);

        if (childNode.tagName == "INPUT")
        {
            var next = childNode.nextSibling;

            if (next && next.tagName == "INPUT" && next.id === (childNode.name + "_TYPE"))
            {
                var value = childNode.value;
                var type = next.value;

                var checkErr = CheckValueType(value, type);
                if (checkErr !== false)
                {
                    var fieldName = document.getElementById(childNode.name + "_NAME");
                    if (!fieldName) 
                        fieldName = "Any numeric";
                    else
                        fieldName = "\"" + fieldName.value + "\"";

                    alert(fieldName + " " + checkErr);
                    return false;
                }
            }
        }

        if (!CheckFormValuesRecurse(childNode))
            return false;
    }    

    return true;
}


function CheckValueType(value, type)
{
    if (value.length == 0)
        return false;

    type = parseInt(type);
    switch(type)
    {
    case -1:
        return false;
    case 2:
        return CheckInt(value);
        break;

    case 3:
        return CheckFloat(value);
        break;

    case 4:
        return CheckDate(value);
        break;

    case 1:
    case 5:
        return false;
        break;

    default:
        alert("Design error. Unknown field type.");
    }

    return false;
}


function CheckInt(value)
{
    var re = new RegExp(/^([-]?)([\d]*)$/);

    if (!re.test(value.toString()))
    {
        return "field can contain minus and numbers only. For example \"6543\" or \"-523\".";
    }

    return false;
}


function CheckFloat(value)
{
    var re = new RegExp(/^([-]?)([\d]*)(\.[\d]*)?$/);

    if (!re.test(value))
        return "field can contain minus and number with floating point only. For example \"6543.34\" or \"-523.764\".";

    return false;
}


function CheckDate(value)
{
    var re = new RegExp(/^[\d]{1,2}\/[\d]{1,2}\/[\d]{4}$/);

    if (!re.test(value))
        return "field can contain date in 'mm/dd/yyyy' format. For example \"11/23/2003\".";

    return false;
}




function CheckFormValuesRecurse2(node, register_form_info)
{
    if (!node)
        return true;

    for(var i = 0; i < node.childNodes.length; i++)
    {
        var childNode = node.childNodes.item(i);

        if (childNode.tagName == "INPUT")
        {
//alert(childNode.name + " " + childNode.id);
            var column_info = GetColumnInfoByControlName(childNode.name, register_form_info);

            if (column_info)
            {
                var value = childNode.value;
                var type = column_info.type;
                var ctrl_type = column_info.ctrl_type;
                var flags = column_info.flags;
                var fieldName = "\"" + column_info.name + "\"";

                if (ctrl_type && ctrl_type == 15)
                {
                    var confirmed_id = column_info.ref_id;
//alert(value +  " " + column_info.control_name + " " + column_info.ref_id);
                    if (confirmed_id && !ConfirmPasswordColumn(value, confirmed_id))
                    {
                        alert(fieldName + " field has different password.");
                        return false;
                    }
                }

                if (flags & 2)
                {
                    if (value.length == 0)
                    {
                        alert(fieldName + " must be filled.");
                        return false;
                    }
                }

                var checkErr = CheckValueType(value, type);
//alert(childNode.name + " " + checkErr + " " + value + " " + type)
                if (checkErr !== false)
                {
                    alert(fieldName + " " + checkErr);
                    return false;
                }
            }
        }

        if (!CheckFormValuesRecurse2(childNode, register_form_info))
            return false;
    }

    return true;
}


function GetColumnInfoByControlName(control_name, register_form_info)
{
    for(var r = 0; r < register_form_info.length; r++)
    {
        var column_info = register_form_info[r];
        if (column_info.control_name === control_name)    
            return column_info;
    }
    return null;
}


function ConfirmPasswordColumn(value, confirmed_id)
{
    var passwd = document.getElementById(confirmed_id);

    if (!passwd)
        return false;

    if (value != passwd.value)
        return false;

    return true;
}



function EnableControls(parentId, bEnable)
{
    var node = document.getElementById(parentId);
    EnaleControlsRecurse(node, bEnable);
}


function EnaleControlsRecurse(node, bEnable)
{
    if (!node)
        return;

    for(var i = 0; i < node.childNodes.length; i++)
    {
        var childNode = node.childNodes.item(i);

        if (childNode.tagName == "INPUT")
        {
            childNode.disabled = !bEnable;
        }

        CheckFormValuesRecurse(childNode);
    }    

    return;
}

function CheckFormValuesRecurse2AddProduct(node, register_form_info, action)
{
    var ok = CheckFormValuesRecurse2(node, register_form_info);
    if (!ok && action != ""){
      eval(action);
    }
    return ok;

}