var udwin = null;
function win_popup(url,w,h) {
    if(udwin && udwin.open && !udwin.closed){ udwin.window.close(); }
    udwin = window.open(url,"WIN","width="+w+",height="+h+",resize=no,scrollbars=yes");
    udwin.focus();
}

function loadChat(){
    window.open('/chat.html', 'unique','scrollbars=no,menubar=no,resizable=0,location=no,screenX=50,screenY=100,width=450,height=360');
}