function zooom(nazev, x, y) {

   var browser = navigator.appName
   var verze = parseInt(navigator.appVersion)
   if ((browser == "Microsoft Internet Explorer" & verze >= 4) || (browser == "Netscape" & verze >= 4))
   {sirka = screen.width; vyska = screen.height; asirka = screen.availWidth; avyska = screen.availHeight;}
   else
   {sirka = x; vyska = y; asirka = x; avyska = y;}

    okno = window.open("", "zoom", "left=0, top=0, width="+x+", height="+y+", toolbar=no, location=no, directories=no, status=no, menubar=no, scrollbars=no, resizable=no, copyhistory=no, top="+(avyska-y)/2+", left="+(asirka-x)/2+"");

	with (okno.document)
		{
		open();
		writeln('<html>\n<body topmargin=0 leftmargin=0>');
		writeln('<a href=\"javascript:window.close();\"><img src="'+nazev+'.jpg" border=\"0\" alt=\"Zavřít okno\"></a>');
		writeln('</body></html>');
		close();
		}
  }


function otevriOkno(nazev, x, y) {
    okno = window.open("", "zoom", "left=0, top=0, width="+x+", height="+y+", toolbar=no, location=no, directories=no, status=no, menubar=no, scrollbars=no, resizable=no, copyhistory=no");

	with (okno.document)
		{
		open();
		writeln('<html>\n<body topmargin=0 leftmargin=0>');
		writeln('<img src="fotogalerie/'+nazev+'.jpg">');
		writeln('</body></html>');
		close();
		}
  }

  
function kontrola()
{
var a=new Array (0,1,2,3,4,5,6,7);
var b=new Array ("firmu", "jméno", "příjmení", "ulici", "město", "PSČ", "telefon", "mobil", "e-mail");
	for (f=0; f<a.length; f++)
	{
		with (document.form)
		{
			if (!elements[a[f]].value) {alert("Musíte zadat "+b[f]+"."); elements[a[f]].focus() ; return false};
		}
	}
	if (!document.form.elements[8].value.search(/^[^.]+(\.[^.]+)*@([^.]+[.])+[a-z]{2,3}$/) == 0) {alert("Musíte zadat e-mail.");document.form.elements[8].focus() ; return false};
}


function insnum()
{
with (event)
if (keyCode<32 || keyCode>57 || keyCode==47) returnValue=false;
}