function toggleximg(id) 
            {
                try
                {
                    if (document.getElementById(id)) 
                    {
                        if (document.getElementById(id).style.display == 'block') 
                        {
                            document.getElementById(id).style.display = 'none';
                            var oldSrc = document.getElementById('sign_' + id).src;
                            var newSrc = oldSrc.replace('minus.gif', 'plus.gif');
                            document.getElementById('sign_' + id).src = newSrc;
                        } 
                        else 
                        {
                            document.getElementById(id).style.display = 'block';
                            var oldSrc = document.getElementById('sign_' + id).src;
                            var newSrc = oldSrc.replace('plus.gif', 'minus.gif');
                            document.getElementById('sign_' + id).src = newSrc;
                        }
                    }
                    else
                    {
                        if (document.layers) 
                        {
                            sign = 'sign_' + id;
                            if (document.id.display == 'block') 
                            {
                                document.id.display = 'none';
                                var oldSrc = document.sign.src;
                                var newSrc = oldSrc.replace('minus.gif', 'plus.gif');
                                document.sign.src = newSrc;
                            } 
                            else 
                            {
                                document.id.display = 'block';
                                var oldSrc = document.sign.src;
                                var newSrc = oldSrc.replace('plus.gif', 'minus.gif');
                                document.sign.src = newSrc;
                            }
                        } 
                        else 
                        {
                            sign = 'sign_' + id;
                            if (document.all.id.style.display == 'block') 
                            {
                                document.all.id.style.display = 'none';
                                var oldSrc = document.all.sign.src;
                                var newSrc = oldSrc.replace('minus.gif', 'plus.gif');
                                document.all.sign.src = newSrc;
                            } 
                            else 
                            {
                                document.all.id.style.display = 'block';
                                var oldSrc = document.all.sign.src;
                                var newSrc = oldSrc.replace('plus.gif', 'minus.gif');
                                document.all.sign.src = newSrc;
                            }
                        }
                    }
                }
                catch (err)
                {
                }
            }