var mobj = null;
var startx = 0;
var starty = 0;

function Calendar (m, y, calDspl, calFrm) {
	this.tabHeader = 'ef4510';
    this.m = m;
    this.y = y;
    this.calDspl = calDspl;
    this.calFrm = calFrm;
    this.obj = '';
    this.http_request = window.XMLHttpRequest ? new XMLHttpRequest() : new ActiveXObject("Microsoft.XMLHTTP");
}

Calendar.prototype.writeDate = function (val) {
    this.calFrm.value = (val < 10 ? '0' : '')+val+'.'+(this.m < 10 ? '0' : '')+this.m+'.'+this.y;
    this.hide();
}

Calendar.prototype.update = function(m,y) {

    this.m = m;
    this.y = y;

    this.http_request.open('GET', '/js/calendar.php?state=update&m='+m+'&y='+y+'&obj='+this.obj+'&headCol='+this.tabHeader, false);
    this.http_request.send(null);

    var text = this.http_request.responseText;
    this.updateText(text);

}

Calendar.prototype.updateText = function(text) {
   document.getElementById('Cal').innerHTML = text;
}

Calendar.prototype.init = function (obj) {
    this.obj = obj;
    this.update(12, 2008);
}

Calendar.prototype.show = function() {
    with(document) {
    	getElementById(this.calDspl).style.position='absolute';
        getElementById(this.calDspl).style.display='block';
    }
}

Calendar.prototype.hide = function() {
    with(document) {
        getElementById(this.calDspl).style.display='none';
    }
}


Calendar.prototype.move = function(event) {
    startx = event.pageX ? event.pageX : event.clientX;
    starty = event.pageY ? event.pageY : event.clientY;
    mobj=document.getElementById(this.calDspl);
    mobj.onmousemove= moveTo;
    mobj.onmouseup = moveStop;
}

function moveTo (event) {
    if(!event)
        event=window.event;

    if (mobj!=null) {
        x = event.pageX ? mobj.offsetLeft + event.pageX - startx : mobj.offsetLeft + event.clientX - startx;
        y = event.pageY ? mobj.offsetLeft + event.pageY - starty : mobj.offsetLeft + event.clientY - starty;

        mobj.style.left = x+'px';
        mobj.style.top = y+'px';
    }
}

function moveStop (event) {
    mobj = null;
}