Popup

function opwin( url, width, height, scroll )
{
    var win = null;
    var winName = '';
    var winl = (screen.width-width) / 2;
    var wint = (screen.height-height) / 2;
    var settings ='height='+height+',';
    settings +='width='+width+',';
    settings +='top='+wint+',';
    settings +='left='+winl+',';
    settings +='scrollbars='+scroll+',';
    settings +='resizable=no';


    win=window.open( url, winName, settings );
    if (parseInt(navigator.appVersion) >= 4) { win.window.focus(); }
}