slide.Registry = []
slide.aniLen = 250
slide.hideDelay = 250
slide.minCPUResolution = 10


// constructor
function slide(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 = "slide_"+id
    eval(this.gRef+"=this")
    slide.Registry[id] = this
    var d = document
    var strCSS = '<style type="text/css">';
    strCSS += '#' + this.id + 'Container { visibility:hidden; '
    strCSS += 'left:' + left + 'px; '
    strCSS += 'top:' + top + '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()
    }
}
slide.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) / slide.aniLen / slide.aniLen

        // set event handlers.
        if (this.ns4) this.menu.captureEvents(Event.MOUSEOVER | Event.MOUSEOUT);
            this.menu.onmouseover = new Function("slide.showMenu('" + this.id + "')")
            this.menu.onmouseout = new Function("slide.hideMenu('" + this.id + "')")
		//set initial state
		this.endSlide()
    }
}

slide.showMenu = function(id){
    var reg = slide.Registry
    var obj = slide.Registry[id]
    if (obj.container) {
        obj.over = true
        for (menu in reg) if (id != menu) slide.hide(menu)
            if (obj.hideTimer) { reg[id].hideTimer = window.clearTimeout(reg[id].hideTimer) }
            if (!obj.open && !obj.aniTimer) reg[id].startSlide(true)
    }
}
slide.hideMenu = function(id){
    var obj = slide.Registry[id]
    if (obj.container) {
        if (obj.hideTimer) window.clearTimeout(obj.hideTimer)
        obj.hideTimer = window.setTimeout("slide.hide('" + id + "')", slide.hideDelay);
    }
}

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

slide.hide = function(id){
    var obj = slide.Registry[id]
    obj.over = false
    if (obj.hideTimer) window.clearTimeout(obj.hideTimer)
        obj.hideTimer = 0
    if (obj.open && !obj.aniTimer) obj.startSlide(false)
}

slide.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()", slide.minCPUResolution)
}
slide.prototype.slide = function() {
    var elapsed = (new Date()).getTime() - this.startTime
    if (elapsed > slide.aniLen) this.endSlide()
    else {
        var d = Math.round(Math.pow(slide.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)
    }
}

slide.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)
    }
}

slide.prototype.setVisibility = function(bShow) {
    var s = this.ns4 ? this.container : this.container.style
    s.visibility = bShow ? "visible" : "hidden"
}

slide.prototype.moveTo = function(p) {
    this.style[this.orientation == "h" ? "left" : "top"] = this.ns4 ? p : p + "px"
}

slide.prototype.getPos = function(c) {
    return parseInt(this.style[c])
}

slide.prototype.onactivate = function() { }

slide.prototype.ondeactivate = function() { }