function showPopup(page, height, width) {
	    var win = null;
            h = height;
            w = width;
            myname = "JSpopup";
            LeftPosition = (screen.width) ? (screen.width-w)/2 : 0;
            TopPosition = (screen.height) ? (screen.height-h)/2 : 0;
            settings = 'height='+h+', width='+w+', top='+TopPosition+', left='+LeftPosition+', menubar=no, resizable=yes, scrollbars=yes, status=no'
            win = window.open(page, myname, settings)
}