var req;

function getGetVar(searchStr)
{
   start = location.search.indexOf(searchStr)+searchStr.length+1;
   end = (location.search.indexOf('&', start) == -1)? location.search.length : location.search.indexOf('&', start);
   return unescape(location.search.substring(start, end));
}

/**
 * Fonction de récupération des paramètres GET de la page
 * @return Array Tableau associatif contenant les paramètres GET
 */
function extractUrlParams(){
	var t = location.search.substring(1).split('&');
	var f = [];
	for (var i=0; i<t.length; i++){
		var x = t[ i ].split('=');
		f[x[0]]=x[1];
	}
	return f;
}

function change_date(cur,month,year) {
 if (month < 10) month = '0'+month;
 if (cur < 10) cur = '0'+cur;
 document.location.href='agenda.php3?lejour='+year+'-'+month+'-'+cur+'&mois='+year+'/'+month+((extractUrlParams()['genre']!=null) ? '&genre='+extractUrlParams()['genre'] : '');
}

function navigate(month,year) {
        var url = "calendar.php?month="+month+"&year="+year;
        if(window.XMLHttpRequest) {
                req = new XMLHttpRequest();
        } else if(window.ActiveXObject) {
                req = new ActiveXObject("Microsoft.XMLHTTP");
        }
        req.open("GET", url, true);
        req.onreadystatechange = callback;
        req.send(null);
}

function callback() {
        obj = document.getElementById("calendar");
        //setFade(0);

		if(req.readyState == 4) {
                if(req.status == 200) {
                        response = req.responseText;
                        obj.innerHTML = response;
                        //fade(0);
                } else {
                        alert("There was a problem retrieving the data:\n" + req.statusText);
                }
        }
}

function fade(amt) {
	if(amt <= 100) {
		setFade(amt);
		amt += 100;
		setTimeout("fade("+amt+")", 5);
    }
}

function setFade(amt) {
	obj = document.getElementById("calendar");

	amt = (amt == 100)?99.999:amt;

	// IE
	obj.style.filter = "alpha(opacity:"+amt+")";

	// Safari<1.2, Konqueror
	obj.style.KHTMLOpacity = amt/100;

	// Mozilla and Firefox
	obj.style.MozOpacity = amt/100;

	// Safari 1.2, newer Firefox and Mozilla, CSS3
	obj.style.opacity = amt/100;
}