function okno(file,ww,wh) {
    var v=parseInt(navigator.appVersion);
    isNetscape=navigator.appName.indexOf('Netscape')>=0;
    var positionCode='';
    var sw  = screen.width;
    var sh  = screen.height;
    var wbx = Math.round((sw-ww)*0.50);
    var wby = Math.round((sh-wh)/5);
    if(isNetscape)
    {
        positionCode='screenX='+wbx+',screenY='+wby+',';
    }
    else
    {
        positionCode='left='+wbx+',top='+wby+',';
    }
params='scrollbars=0,width='+ww+',height='+wh+','+positionCode+'offscreenBuffering=0,alwaysRaised=0,resizable=no';
zoom=window.open(file,'zoom',params);
}