// pop window for help boxes
var newwindow = ''
function popitup(url,winparameters) 
{
    if (newwindow.location && !newwindow.closed) 
    {
        newwindow.location.href = url;
        newwindow.focus(); 
    }
    else 
    {
        newwindow=window.open(url,'htmlname',winparameters,'true');
    }
}