/*****************************************************
 * based on ypSlideOutMenu script from youngpup
 *****************************************************/

ypSlideOutMenu.Registry = [];
ypSlideOutMenu.aniLen = 73;
ypSlideOutMenu.hideDelay = 500;
ypSlideOutMenu.minCPUResolution = 10;

// constructor
function ypSlideOutMenu(id,isCurrent){
    
    this.ie  = document.all ? 1 : 0;
    this.ns4 = document.layers ? 1 : 0;
    this.dom = document.getElementById ? 1 : 0;
    var height = 400;
    var width = 150;    
    if (this.ie || this.ns4 || this.dom) {
    	
        this.id          = id;
        this.orientation = "v";
        this.dirType     = "-";
        this.dim         = height;
        this.hideTimer   = false;
        this.aniTimer    = false;
        this.open        = false;
        this.over        = false;
        this.startTime   = 0;
        this.isCurrent  = isCurrent;
	
	
        // 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;
	
        var strCSS = '<style type="text/css">';
        strCSS += '#' + this.id + 'Container { visibility:hidden; ';
        strCSS += 'left:' + getX(id) + 'px; ';
        strCSS += 'top:' + getY(id) + 'px; ';
        strCSS += 'overflow:hidden; z-index:10000; }';
        strCSS += '#' + this.id + 'Container, #' + this.id + 'Content { position:absolute; ';
        strCSS += 'width:' + width + 'px; ';
        strCSS += 'height:' + height + 'px; ';               
        strCSS += 'clip:rect(0, ' + width + ', ' + height + ', 0); ';
        strCSS += '}';
        strCSS += '</style>';


        d.write(strCSS);
        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);
        this.menu.onmouseover = new Function("ypSlideOutMenu.showMenu('" + this.id + "')");
        this.menu.onmouseout = new Function("ypSlideOutMenu.hideMenu('" + this.id + "'," + this.isCurrent + ")");

        //set initial state
        this.endSlide();
    }
}

ypSlideOutMenu.showMenu = function(id) {
    var reg = ypSlideOutMenu.Registry;
    var obj = ypSlideOutMenu.Registry[id];	
      
    if (obj.container) {
        obj.over = true;

        // close other menus.
        for (menu in reg) {
            if (id != menu) {
                ypSlideOutMenu.hide(menu);
            }
        }
        // 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);            
        }
    }
    topmenuOn(id);
}

ypSlideOutMenu.hideMenu = function(id,isCurrent) {    
    // 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);
    }
    if (! isCurrent){
        topmenuOff(id);
    }
}

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 == "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() { }