var pixwin=null;
function pixwinopen(){
        if (pixwin && pixwin.open && !pixwin.closed) {          
                pixwin.close();
        }
        var pixwin = null 
        pixwin = window.open("",'pixwin','resizable=yes,menubar=no,toolbar=yes,scrollbars=yes,width=740,height=500,location=no,copyhistory=no');
        pixwin.focus()
        return true
}