var kam_loading_puvodni;

function ajax(stranka, kam, loading, method, kam_loading, loading_text, loading_obnovit, after_do)
{
    var str = stranka.split("?");
    var url;
	var parametrs;

	for(i = 0; i < str.length; i++) {
		if (i == 0) url = str[i];
		if (i == 1) parametrs = str[i];
		else parametrs += "?"+str[i];
	}

	if (kam_loading != null) kam_loading_puvodni = document.getElementById(kam_loading).innerHTML;

	if (loading == null) loading = true;
	if (method == null) method = "GET";
    var httpRequest;

    if(typeof window.ActiveXObject != 'undefined')
    {
        httpRequest = new ActiveXObject("Microsoft.XMLHTTP");
    }
    else
    {
        httpRequest = new XMLHttpRequest();
    }
	if (method == "POST") httpRequest.open(method, url, true);
	else httpRequest.open(method, url+"?"+parametrs, true);
    if (method == "POST") {
    	httpRequest.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
		httpRequest.setRequestHeader("Content-length", parametrs.length);
		httpRequest.setRequestHeader("Connection", "close");
    }
    httpRequest.onreadystatechange= function ()
    {
		processRequest(httpRequest, kam, loading, kam_loading, loading_text, loading_obnovit, after_do)
    };
    if (method == "POST") httpRequest.send(parametrs);
	else httpRequest.send(null);
}


function processRequest(httpRequest, kam, loading, kam_loading, loading_text, loading_obnovit, after_do)
{
	if (loading_obnovit == null) loading_obnovit = true;
	if (httpRequest.readyState == 4)
    {
        if (( httpRequest.status >= 200 && httpRequest.status < 300 ) || httpRequest.status == 304)
        {
            if (typeof kam == 'string')
            {
                document.getElementById(kam).innerHTML = httpRequest.responseText;
            }
            if (typeof kam == 'function')
            {
                kam(httpRequest.responseText);
            }

            if (kam_loading != null && loading_obnovit) document.getElementById(kam_loading).innerHTML = kam_loading_puvodni;

            if (after_do != null && after_do[0] == 1) ajax("forum-ajax.php?id=7&kde="+after_do[1]+"&r="+after_do[2]+"&a="+after_do[3]+"&na="+after_do[5]+"&x="+after_do[4], "forum_prispevky", false);
        }
        else
        {
            alert("Chyba při načítání stránky " + httpRequest.status + " : " + httpRequest.statusText);
        }
    }
    else
    {
    	var kam_final;
        if (kam_loading != null) kam_final = kam_loading;
        else kam_final = kam;

        if (typeof kam_final == 'string' && kam_final != '' && loading)
        {
			if (loading_text == "" || loading_text == null) document.getElementById(kam_final).innerHTML = "<img style='vertical-align: bottom' src='skins/game_new/default/gfx/ajax-loader.gif' alt='Načítám...' />";
			else document.getElementById(kam_final).innerHTML = "<i>"+loading_text+"</i>";
        }
    }

}