function ValidateCustomForm (formName, validationMessageControl)
{
    var objCollFormObjects = document.forms[formName].getElementsByTagName('input');
    var formIsValid = true;
    var itemOrdinal = 0;
    var itemName = '';
    
    for (itemOrdinal; itemOrdinal < objCollFormObjects.length; itemOrdinal++)
    {
        itemName = objCollFormObjects[itemOrdinal].name;
        if (itemName.substring(0,1) == '_')
        {
            if (objCollFormObjects[itemOrdinal].value == '')
            {
                formIsValid = false;
                break;
            }
        }
    }
   
    if (formIsValid == false)
    {
        document.getElementById(validationMessageControl).style.display = "inline";
    }
    else
    {
        document.getElementById(validationMessageControl).style.display = "none";
    }
    
    return formIsValid;
}