var xmlHttp = null;
var lang = "sp";

function nav(page, params)
{
//	if (str.length==0) {
//		document.getElementById("txtHint").innerHTML="";
//		return;
//	}
	try { // Firefox, Opera 8.0+, Safari, IE7
		xmlHttp = new XMLHttpRequest();
	} catch(e) { // Old IE
		try {
			xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
		} catch(e) {
			// browser does not support XMLHTTP
			var url="index.php?page=" + page + "&lang=" + lang + "&oldbrowser=true";
			if(params != null) {
				url = url + "&" + params;
			}
			url = url + "&sid=" + Math.random();
			document.location = url;
			return;
		}
	}
	var url="pages/" + page + ".php?lang=" + lang;
	if(params != null) {
		url = url + "&" + params;
	}
	url = url + "&sid=" + Math.random();
	xmlHttp.open("GET", url, false);
	xmlHttp.send(null);
	document.getElementById("text").innerHTML = xmlHttp.responseText;
}

function collect()
{
	var f = document.forms[0];
	var who = f.name.value;
	var email = f.email.value;
	var si = f.how.selectedIndex;
	var how = f.how.options[si].value;
	var rec = f.rec.value;
	var list = "";
	for(i = 0; i < f.tracks.length; i++) {
		if(f.tracks[i].checked) {
			list = list + f.tracks[i].value + ",";
		}
	}
	if(list.length == 1) {
		list = "";
	} else {
		list = list.substr(0, list.length - 1);
	}
	params = 'name=' + who + '&email=' + email + '&how=' + how + '&rec=' + rec + '&tracks=' + list;
	nav('download_notify', params);
}