var PicWin=null;
var windowopened=0;
function popup(filename,title,sizex,sizey)
{
if(windowopened!=0){PicWin.close();}
PicWin = window.open("","Screenshot","width="+sizex+",height="+sizey+",resizable=no,scrollbars=no,screenX="+((screen.width-sizex)/2)+",screenY="+((screen.height-sizey)/2)+",top="+((screen.height-sizey)/2)+",left="+((screen.width-sizex)/2));
PicWin.opener = self;
PicWin.document.write (""+title+"
");
PicWin.document.close();
}