var IE=navigator.appName.indexOf("Microsoft")!=-1;
var NN=navigator.appName.indexOf("Netscape")!=-1;
var browserVer=parseInt(navigator.appVersion);

function apri(url,larg,alt,scrol,resiz)
{
 if (typeof(larg)=="undefined") larg=500;
 if (typeof(alt)=="undefined") alt=400;
 if (typeof(scrol)=="undefined") scrol="yes";
 if (typeof(resiz)=="undefined") resiz="yes";
 posX = (screen.width/2) - (larg/2);
 posY = (screen.height/2) - (alt/2);
 var nomerandom=""; 
 for(nomerandom_i=0;nomerandom_i<=10;nomerandom_i++) nomerandom+=String.fromCharCode(Math.round(97+25*Math.random()));
 var siteWindowVar=open(url,nomerandom,"toolbar=no,status=no,menubar=no,scrollbar s="+scrol+" "+",resizable="+resiz+",location=no,directories=no,width="+larg+",height="+alt+""+",top="+posY+",left="+posX);
 if (NN||browserVer>=4) { siteWindowVar.focus(); siteWindowVar.focus(); }
}