/*****************************************************/

function findObj(n, d)
{ 
  var p,i,x;
  if (!d)
     d=document;
  if ((p=n.indexOf("?"))>0&&parent.frames.length)
  {
    d=parent.frames[n.substring(p+1)].document;
    n=n.substring(0,p);
  }
  if (!(x=d[n])&&d.all)
     x=d.all[n];
  for (i=0;!x&&i<d.forms.length;i++)
      x=d.forms[i][n];
  for (i=0;!x&&d.layers&&i<d.layers.length;i++)
      x=findObj(n,d.layers[i].document);
  if (!x && document.getElementById)
     x=document.getElementById(n);
  return x;
}

function showHideLayers()
{
  var i,p,v,obj,args=showHideLayers.arguments;
  for (i=0; i<(args.length-2); i+=3)
      if ((obj=findObj(args[i]))!=null)
      {
        v=args[i+2];
        if (obj.style)
        {
         obj=obj.style;
         v=(v=='show')?'visible':(v='hide')?'hidden':v;
        }
        obj.visibility=v;
      }
}


/*****************************************************/

ypSlideOutMenu.Registry = [];
ypSlideOutMenu.aniLen = 250;
ypSlideOutMenu.hideDelay = 100;
ypSlideOutMenu.minCPUResolution = 10;


// constructor
function ypSlideOutMenu(id, dir, left, top, width, height)
{

    this.ie  = document.all ? 1 : 0;
    this.ns4 = document.layers ? 1 : 0;
    this.dom = document.getElementById ? 1 : 0;

    if (this.ie || this.ns4 || this.dom) 
    {
        this.id             = id;
        this.dir            = dir;
        this.orientation    = dir == "left" || dir == "right" ? "h" : "v";
        this.dirType        = dir == "right" || dir == "down" ? "-" : "+";
        this.dim            = this.orientation == "h" ? width : height;
        this.hideTimer      = false;
        this.aniTimer       = false;
        this.open           = false;
        this.over           = false;
        this.startTime      = 0;

        // global reference to this object
        this.gRef = "ypSlideOutMenu_"+id;
        eval(this.gRef+"=this");

        // add this menu object to an internal list of all menus
        ypSlideOutMenu.Registry[id] = this;

        var d = document;
        d.write('<style type="text/css">');
        d.write('#' + this.id + 'Container { visibility:hidden; ');
        d.write('border: 0px solid #000000; ');
        d.write('left:' + left + 'px; ');
        d.write('top:' + top + 'px; ');
        d.write('overflow:hidden; }');
        d.write('#' + this.id + 'Container, #' + this.id + 'Content { position:absolute; ');
        d.write('width:' + width + 'px; ');
        d.write('height:' + height + 'px; ');
        d.write('clip:rect(0 ' + width + ' ' + height + ' 0); ');
        d.write('border: 0px solid #000000; ');
        d.write('vertical-align: top; ');
        d.write('text-align: left; ');
        d.write('}');
        d.write('</style>');

        this.load();
    }
}

ypSlideOutMenu.prototype.load = function() {
    var d = document;
    var lyrId1 = this.id + "Container";
    var lyrId2 = this.id + "Content";
    var obj1 = this.dom ? d.getElementById(lyrId1) : this.ie ? d.all[lyrId1] : d.layers[lyrId1];
    if (obj1) var obj2 = this.ns4 ? obj1.layers[lyrId2] : this.ie ? d.all[lyrId2] : d.getElementById(lyrId2);
    var temp;

    if (!obj1 || !obj2)
    {
        window.setTimeout(this.gRef + ".load()", 100);
    }
    else 
    {
        this.container  = obj1;
        this.menu       = obj2;
        this.style      = this.ns4 ? this.menu : this.menu.style;
        this.homePos    = eval("0" + this.dirType + this.dim);
        this.outPos     = 0;
        this.accelConst = (this.outPos - this.homePos) / ypSlideOutMenu.aniLen / ypSlideOutMenu.aniLen ;

        // set event handlers.
        if (this.ns4) this.menu.captureEvents(Event.MOUSEOVER | Event.MOUSEOUT);
        //set initial state
        this.endSlide();
    }
}
    
ypSlideOutMenu.showMenu = function(id) {
    var reg = ypSlideOutMenu.Registry;
    var obj = ypSlideOutMenu.Registry[id];
    
    if (obj.container) 
    {
        obj.over = true;

        // if this menu is scheduled to close, cancel it.
        if (obj.hideTimer) 
        { 
            reg[id].hideTimer = window.clearTimeout(reg[id].hideTimer); 
        }

        // if this menu is closed, open it.
        if (!obj.open && !obj.aniTimer) reg[id].startSlide(true);
    }
}

ypSlideOutMenu.hideMenu = function(id) {
    // schedules the menu to close after <hideDelay> ms, which
    // gives the user time to cancel the action if they accidentally moused out
    var obj = ypSlideOutMenu.Registry[id];
       if (obj.container) 
       {
           if (obj.hideTimer) window.clearTimeout(obj.hideTimer);
           obj.hideTimer = window.setTimeout("ypSlideOutMenu.hide('" + id + "')", ypSlideOutMenu.hideDelay);
       }
}

ypSlideOutMenu.hide = function(id) {
    var obj = ypSlideOutMenu.Registry[id];
    obj.over = false;

    if (obj.hideTimer) window.clearTimeout(obj.hideTimer);
    
    // flag that this scheduled event has occured.
    obj.hideTimer = 0;

    // if this menu is open, close it.
    if (obj.open && !obj.aniTimer) obj.startSlide(false);
}

ypSlideOutMenu.prototype.startSlide = function(open) {
    this[open ? "onactivate" : "ondeactivate"]();
    this.open = open;
    if (open) this.setVisibility(true);
    this.startTime = (new Date()).getTime();
    this.aniTimer = window.setInterval(this.gRef + ".slide()", ypSlideOutMenu.minCPUResolution);
}

ypSlideOutMenu.prototype.slide = function() {
    var elapsed = (new Date()).getTime() - this.startTime;
    if (elapsed > ypSlideOutMenu.aniLen)
    { 
        this.endSlide();
    }
    else 
    {
        var d = Math.round(Math.pow(ypSlideOutMenu.aniLen-elapsed, 2) * this.accelConst);
        if (this.open && this.dirType == "-")       d = -d;
        else if (this.open && this.dirType == "+")  d = -d;
        else if (!this.open && this.dirType == "-") d = -this.dim + d;
        else                                        d = this.dim + d;

        this.moveTo(d);
    }
}

ypSlideOutMenu.prototype.endSlide = function() {
    this.aniTimer = window.clearTimeout(this.aniTimer);
    this.moveTo(this.open ? this.outPos : this.homePos);
    if (!this.open) this.setVisibility(false);
    
    if ((this.open && !this.over) || (!this.open && this.over)) 
    {
        this.startSlide(this.over);
    }
}

ypSlideOutMenu.prototype.setVisibility = function(bShow) { 
    var s = this.ns4 ? this.container : this.container.style;
    s.visibility = bShow ? "visible" : "hidden";
}
ypSlideOutMenu.prototype.moveTo = function(p) { 
    this.style[this.orientation == "h" ? "left" : "top"] = this.ns4 ? p : (p) + "px";
}
ypSlideOutMenu.prototype.getPos = function(c) {
    return parseInt(this.style[c]);
}

// events
ypSlideOutMenu.prototype.onactivate   = function() { }
ypSlideOutMenu.prototype.ondeactivate = function() { }


/*****************************************************/