function findObj(n, d) {  
  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=findObj(n,d.layers[i].document); 
  if(!x && document.getElementById) x=document.getElementById(n); return x; 
} 

function zmenaSerazeni(category,k,vystup,search,strana) {

	var url="";
	
	if (vystup=="text") {
		url="vystup=text";
	}

	if (search!="") {
		if (url!=""){
			url=url+"&";
		}
		url=url+"search="+search
	}

	// if ((strana!="") && (strana!=0)) {
	// 	if (url!=""){
	// 		url=url+"&";
	// 	}
	// 	url=url+"strana="+strana
	// }
	
	if (url!="") {
		url="&"+url;
		}

	document.location="shop.php?category="+category+"&k="+k+"&serazeni="+findObj('serazeni2').value+url;
}

function zmenaNahledu(category,k,serazeni,search) {

	var url="";
	
	
	url="serazeni="+serazeni;
	
	if (search!="") {
		if (url!=""){
			url=url+"&";
		}
		url=url+"search="+search
	}
	
	if (url!="") {
		url="&"+url;
		}

	document.location="shop.php?category="+category+"&k="+k+"&vystup="+findObj('zobrazeni').value+url;
}

function zmenaSerazeni2(k,vystup,search,strana) {

	var url="";
	
	if (vystup=="text") {
		url="vystup=text";
	}

	if (search!="") {
		if (url!=""){
			url=url+"&";
		}
		url=url+"search="+search
	}

	// if ((strana!="") && (strana!=0)) {
	// 	if (url!=""){
	// 		url=url+"&";
	// 	}
	// 	url=url+"strana="+strana
	// }
	
	if (url!="") {
		url="&"+url;
		}

	document.location="shop.php?k="+k+"&serazeni="+findObj('serazeni3').value+url;
}

function zmenaNahledu2(k,serazeni,search) {

	var url="";
	
	
	url="serazeni="+serazeni;
	
	if (search!="") {
		if (url!=""){
			url=url+"&";
		}
		url=url+"search="+search
	}
	
	if (url!="") {
		url="&"+url;
		}

	document.location="shop.php?k="+k+"&vystup="+findObj('zobrazeni2').value+url;
}