function MM_findObj(n, d) { //v4.01
  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);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_showHideLayers() { //v6.0
  var i,p,v,obj,args=MM_showHideLayers.arguments;
  for (i=0; i<(args.length-2); i+=3) if ((obj=MM_findObj(args[i]))!=null) { v=args[i+2];
    if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v=='hide')?'hidden':v; }
    obj.visibility=v; }
}

function popup(url,name){
	w=655;
	h=515;
	param='toolbar=0,width='+w+',height='+h+',scrollbars=0,location=0,resizable=0,status=0';
	openWin=window.open(url,name,param);
}

function submitform(){
	  jmeno = document.forms['poptavka'].name.value;
	  tel = document.forms['poptavka'].phone.value;
		if (jmeno == '')
			{
			window.alert('Prosím zadejte Vaše jméno.');
			document.forms['poptavka'].name.focus();
			return;
			}
		else if (tel == '')
			{
			window.alert('Prosím zadejte Váš telefon.');
			document.forms['poptavka'].phone.focus();
			return;
			}
		else
		{
		document.poptavka.submit();
		}
	}