function showCustomer(str) { 
	xmlHttp=GetXmlHttpObject();
	if (xmlHttp==null) {alert ("Your browser does not support AJAX!"); return; } 
	var url="pocitej.php";
	url=url+"?q="+str;
	url=url+"&sid="+Math.random();
	xmlHttp.onreadystatechange=stateChanged;
	xmlHttp.open("GET",url,true);
	xmlHttp.send(null);
}  

var fid = "";
var prikaz = "";

function pr() {
	xmlHttp=GetXmlHttpObject();
	if (xmlHttp==null) {alert ("Your browser does not support AJAX!"); return; } 
	var url="vypocet_pr.php";	
	// url=url+"?id="+fid+"&prikaz="+prikaz;
	url=url+"&sid="+Math.random();
	xmlHttp.onreadystatechange=stateChanged;
	xmlHttp.open("GET",url,true);
	xmlHttp.send(null);
}  


function stateChanged() { 
	if (xmlHttp.readyState==4) { 
		document.getElementById('pr_prehled').innerHTML=xmlHttp.responseText;
	}
}  
  
function GetXmlHttpObject() {
	var xmlHttp=null;
	try {xmlHttp=new XMLHttpRequest(); } // firefox, safari, opera
	catch (e) {
	  try {xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");} // msie
	  catch (e) {xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");}
  }
	return xmlHttp;
}