/*****************************************************
* ypSlideOutMenu
* 3/04/2001
*
* a nice little script to create exclusive, slide-out
* menus for ns4, ns6, mozilla, opera, ie4, ie5 on 
* mac and win32. I've got no linux or unix to test on but 
* it should(?) work... 
*
* Revised:
* - 08/29/2002 : added .hideAll()
*
* --youngpup--
*****************************************************/
ypSlideOutMenu.Registry = []
ypSlideOutMenu.aniLen = 250
ypSlideOutMenu.hideDelay = 5
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
        this.gRef = "ypSlideOutMenu_"+id
        eval(this.gRef+"=this")
        ypSlideOutMenu.Registry[id] = this
        var d = document
        d.write('<style type="text/css">')
        d.write('#' + this.id + '_Menu { visibility:hidden; ')
        d.write('left:' + left + 'px; ')
        d.write('top:' + top + 'px; ')
        d.write('overflow:hidden; }')
        d.write('#' + this.id + '_Menu, #' + this.id + '_Nav { position:absolute; ')
        d.write('width:' + width + 'px; ')
        d.write('height:' + height + 'px; ')
        d.write('clip:rect(0 ' + width + ' ' + height + ' 0); ')
        d.write('}')
        d.write('</style>')
        this.load()
    }
}

ypSlideOutMenu.prototype.load = function() {
    var d = document
    var lyrId1 = this.id + "_Menu"
    var lyrId2 = this.id + "_Nav"
    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 + "')")
        //set initial state
        this.endSlide()
    }
}

ypSlideOutMenu.showMenu = function(id) {
    var reg = ypSlideOutMenu.Registry
    var obj = ypSlideOutMenu.Registry[id]
    if (obj.container) {
        obj.over = true
        for (menu in reg) if (id != menu) ypSlideOutMenu.hide(menu)
        if (obj.hideTimer) { 
            reg[id].hideTimer = window.clearTimeout(reg[id].hideTimer) 
        }
        if (!obj.open && !obj.aniTimer) reg[id].startSlide(true)
    }
}

ypSlideOutMenu.hideMenu = function(id) {
    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.hideAll = function() {
    var reg = ypSlideOutMenu.Registry
    for (menu in reg) {
        ypSlideOutMenu.hide(menu);
        if (menu.hideTimer) window.clearTimeout(menu.hideTimer);
    }
}

ypSlideOutMenu.hide = function(id) {
    var obj = ypSlideOutMenu.Registry[id]
    obj.over = false
    if (obj.hideTimer) window.clearTimeout(obj.hideTimer)
    obj.hideTimer = 0
    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])
}

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