// Check web browser ability
if(document.all && !document.getElementById) {
    document.getElementById = function(id) {
        return document.all[id];
    }
}

var show = 'null';
    
function toggleMe(row)
{
    if (show != 'null')
        {
            document.getElementById(show).style.display = "none";
        }
    if (show != row)
        {
            document.getElementById(row).style.display = "block";
            show = row;
        }
    else
        {
            show = 'null';
        }
}