function PopUpWindow(URL, width, height, popupname) {
    var left = (screen.width - width) / 2;
    var top = (screen.height - height) / 2;

    if (!window.showModalDialog) {
        var options = "width = " + width + ", height = " + height + ", left = " + left + ", top = " + top +", scrollbars=1";
        options += ", dialog = yes, modal = yes, dependent = yes";
        var newwindow = window.open(URL, popupname, options);
        if (window.focus) {
            newwindow.focus();
	}
    } else {
      var options = "dialogWidth = " + width + ", dialogHeight = " + height + ", center = yes";
      var options = 'dialogWidth:' + width + 'px;dialogHeight:' + height + 'px; center:yes; scroll:no; status:no; resizable:no; help:no;';
      var newwindow = window.showModalDialog(URL, popupname, options);
    }
    return false;
}