function get_open(url) {
 okno=window.open('/libjs/i.php?id='+url,'img','width=250,height=250');
}

function test() {
 if (!okno) return false;
 else if (okno.closed) return false;
 else return true
}

function open_link(Url,w,h) {
 window.open(Url,'window','width='+w+',height='+h+',left='+(screen.availWidth/2-(w/2))+',top='+(screen.availHeight/2-(h/2))+'');
}