function Zoom(CestaObr,sirka,vyska)
{
	var posunX, posunY;
	var XLeft, YTop, PomScroll;

	posunX = 3;
	posunY = 3;
	
	sirka = sirka + posunX;
	vyska = vyska + posunY;

	pomScroll = "no";
	if( screen.availWidth < sirka )
	{
		XLeft = 0;
		sirka = screen.availWidth;
		PomScroll = "yes";
	} 
	else XLeft = Math.round( (screen.availWidth - sirka)/2 );

	if( screen.availHeight < vyska )
	{
		YTop = 0;
		vyska = screen.availHeight;
		PomScroll = "yes";
	} 
	else YTop = Math.round( (screen.availHeight - vyska)/2 );

	okno=window.open("","zoom","left="+XLeft+",top="+YTop+",width="+sirka+",height="+vyska+","+
	"toolbar=no,location=no,directories=no,status=no,menubar=no,"+
	"scrollbars="+PomScroll+",resizable=yes,copyhistory=no");
	okno.document.open();
	okno.document.writeln('<HTML>\n<BODY TOPMARGIN="0" LEFTMARGIN="0" BOTTOMMARGIN="0" RIGHTMARGIN="0" bgcolor=white onclick=self.close()>');
	okno.document.writeln('<div align="center"><IMG ID="Cely" SRC="'+CestaObr+'" style="."></div>');	
	okno.document.writeln('</BODY>\n</HTML>');
	okno.document.close();	
	okno.moveTo(XLeft, YTop);
	okno.resizeTo(sirka, vyska+20);
	okno.focus();				
				
}
