popup = "";
function pop_winpopup(psjs_url){
    if(popup){
        if(popup.closed){
            popup = window.open(psjs_url, "popup", "top=" + ((screen.availHeight/2) - (550 / 2)) + ",left=" + ((screen.availWidth/2) - (680 / 2)) + ",width=680,height=550,resizable=1,toolbar=0,scrollbars=1,location=0,status=0,menubar=0")
        } else {
            popup.location = psjs_url;
        }
    } else {
        popup = window.open(psjs_url, "popup", "top=" + ((screen.availHeight/2) - (550 / 2)) + ",left=" + ((screen.availWidth/2) - (680 / 2)) + ",width=680,height=550,resizable=1,toolbar=0,scrollbars=1,location=0,status=0,menubar=0")
    }
}