var lar = 0;
var alt = 0;
var hei = 0;
var lar2 = 0;
var alt2 = 0;
var hei2 = 0;

var agt=navigator.userAgent.toLowerCase();

if (navigator.appVersion.indexOf("Mac") != -1)
	{
	lar = (((window.screen.availWidth)-320)/2);
	alt = (((window.screen.availHeight)-195)/2);
	hei = 196;
	lar2 = (((window.screen.availWidth)-600)/2);
	alt2 = (((window.screen.availHeight)-320)/2);
	hei2 = 321;
}
else
	{
	lar = (((window.screen.availWidth)-320)/2);
	alt = (((window.screen.availHeight)-195)/2);
	hei = 195;
	lar2 = (((window.screen.availWidth)-600)/2);
	alt2 = (((window.screen.availHeight)-320)/2);
	hei2 = 320;
}

function pop(url)
	{
	window.open(url,'_blank','width=320, left='+lar+', top='+alt+', height='+hei)
}
function pop2(url)
	{
	window.open(url,'_blank','width=600, left='+lar2+', top='+alt2+', height='+hei2)
}
<!--
function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_findObj(n, d) { //v3.0
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}
//-->