var http_request = false;
function makePOSTRequest(url, parameters) {
	http_request = false;
  if (window.XMLHttpRequest) { // Mozilla, Safari,...
    http_request = new XMLHttpRequest();
    if (http_request.overrideMimeType) {
    	http_request.overrideMimeType('text/html');
    }
  } else if (window.ActiveXObject) { // IE
    try {
      http_request = new ActiveXObject("Msxml2.XMLHTTP");
    	} catch (e) {
      	try {
          http_request = new ActiveXObject("Microsoft.XMLHTTP");
        } catch (e) {}
      }
  	}
    if (!http_request) {
      alert('Lost connection');
      return false;
  	}
	http_request.onreadystatechange = alertContents;
    http_request.open('POST', url, true);
    http_request.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
    http_request.setRequestHeader("Content-length", parameters.length);
    http_request.setRequestHeader("Connection", "close");
    http_request.send(parameters);
}

function alertContents() {
	if (http_request.readyState == 4) {
  	if (http_request.status == 200) {
      result = http_request.responseText;
      document.getElementById('prispevky').innerHTML = result;
    } else {
      alert('Report error');
    }
  }
}

function get(pid) {
  var txtQty="qty_"+pid;
  var itemCena="cena_"+pid;
  var itemKolekce="kolekce_"+pid;
  var itemRozmer="rozmer_"+pid;
  var itemJadro="jadro_"+pid;
  var itemPotah="potah_"+pid;
  var cenik_id="cenik_"+pid;

  var poststr =	"txtQty=" + encodeURI( document.getElementById(txtQty).value ) +
  				"&cenik_id=" + encodeURI( document.getElementById(cenik_id).value ) +
                "&itemcena=" + encodeURI( document.getElementById(itemCena).value ) +
                "&itemkolekce=" + encodeURI( document.getElementById(itemKolekce).value ) +
                "&itemrozmer=" + encodeURI( document.getElementById(itemRozmer).value ) +
                "&itemjadro=" + encodeURI( document.getElementById(itemJadro).value ) +
                "&itempotah=" + encodeURI( document.getElementById(itemPotah).value ) +
                "&addtokosik="+ 1;
  makePOSTRequest('./inc/kosicek.php', poststr);
  alert('Zboží bylo přidáno do košíku');
//  document.write(document.getElementById(cenik_id).value);
//  document.chat.text.value="";
}

function del(pid) {
  var itemdel= pid;
  var poststr =	"delid=" + encodeURI( document.getElementById(txtQty).value ) +
                "&itempotah=" + encodeURI( document.getElementById(itemPotah).value ) +
                "&addtokosik="+ 1;
  makePOSTRequest('./inc/akce.php', itemdel);
  alert('Zboží bylo smazáno!');
}

ms=0;
stav=0;

function zobraz() {
	setTimeout("zobraz();",10);

	if (stav==0) {
		stav=1;
		then=new Date();
		then.setTime(then.getTime()-ms);
  }else{
		stav=0;
		now=new Date();
		ms=now.getTime()-then.getTime();
	}
  max_s = 0.5;
  s = Math.round(ms / 1000);

  if(s > max_s) {
    var poststr =	"";
    makePOSTRequest('./inc/kosicek.php', poststr);
	ms = 0;
  }
}