var req;

function navigate(month) {
    var param;
    var url;
    var now = new Date();

    if (month == '') {
        param = now.getFullYear()+'-'+(now.getMonth()+1)+'-1';
    } else {
        param = month;
    }

    url = "/scripts/event_mini_calendar.php?month="+param;
    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("event_mini_calendar");
    setFade(0);
    if(req.readyState == 4) {
        if(req.status == 200) {
            response = req.responseText;
            //alert(response);
            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 += 10;
        setTimeout("fade("+amt+")", 5);
    }
}

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

//
//  Event tooltip
//

var offsetxpoint=0; //Customize x offset of tooltip
var offsetypoint=20; //Customize y offset of tooltip
var ie=document.all;
var ns6=document.getElementById && !document.all;
var enabletip=false;
var tipobj = document.getElementById("eventtooltip");


function ietruebody(){
    return (document.compatMode && document.compatMode!="BackCompat")? document.documentElement : document.body
}

function tooltip(thetext, thecolor, thewidth){
    tipobj = document.getElementById("eventtooltip");
    if (ns6||ie){
        if (typeof thewidth!="undefined") tipobj.style.width=thewidth+"px"
        if (typeof thecolor!="undefined" && thecolor!="") tipobj.style.backgroundColor=thecolor
        tipobj.innerHTML=thetext
        enabletip=true
        return false
    }
}

function positiontip(e){
    tipobj = document.getElementById("eventtooltip");
    if (enabletip){
        var curX=(ns6)?e.pageX : event.clientX+ietruebody().scrollLeft;
        var curY=(ns6)?e.pageY : event.clientY+ietruebody().scrollTop;
        //Find out how close the mouse is to the corner of the window
        var rightedge=ie&&!window.opera? ietruebody().clientWidth-event.clientX-offsetxpoint : window.innerWidth-e.clientX-offsetxpoint-20
        var bottomedge=ie&&!window.opera? ietruebody().clientHeight-event.clientY-offsetypoint : window.innerHeight-e.clientY-offsetypoint-20

        var leftedge=(offsetxpoint<0)? offsetxpoint*(-1) : -1000

        //if the horizontal distance isn't enough to accomodate the width of the context menu
        if (rightedge<tipobj.offsetWidth)
            //move the horizontal position of the menu to the left by it's width
            tipobj.style.left=ie? ietruebody().scrollLeft+event.clientX-tipobj.offsetWidth+"px" : window.pageXOffset+e.clientX-tipobj.offsetWidth+"px"
        else if (curX<leftedge)
            tipobj.style.left="5px"
        else
            //position the horizontal position of the menu where the mouse is positioned
            tipobj.style.left=curX+offsetxpoint+"px"

        //same concept with the vertical position
        if (bottomedge<tipobj.offsetHeight)
            tipobj.style.top=ie? ietruebody().scrollTop+event.clientY-tipobj.offsetHeight-offsetypoint+"px" : window.pageYOffset+e.clientY-tipobj.offsetHeight-offsetypoint+"px"
        else
            tipobj.style.top=curY+offsetypoint+"px"
        tipobj.style.visibility="visible"
    }
}

function hidetooltip(){
    if (ns6||ie){
        enabletip=false
        tipobj.style.visibility="hidden"
        tipobj.style.left="-1000px"
        tipobj.style.backgroundColor=''
        tipobj.style.width=''
    }
}

document.onmousemove=positiontip