var screenW = screen.width;
var screenH = screen.height;

function openWinSid(newID) {
    var w = 750;
    var h = 600;
    var x = (screenW - w) / 2;
    var y = (screenH - h) / 2;

    myWin = window.open(
    "http://dlgcsm.galib.uga.edu/StyleServer/calcrgn?"
    + "browser=ns&cat=gsfr&wid=500&hei=500&style=gsfr/gsfr.xsl&"
    + "item=" + newID + ".sid",
    "_blank",
    "toolbar=0,location=0,directories=0,menubar=1,status=1," +
    "scrollbars=0,resizable=1,copyhistory=0," +
    "width="+w+",height="+h+",left="+x+",top=25"
    );
    myWin.focus();
}