/*****************************************************
 * 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...
 *
 * --youngpup--
 *****************************************************/

ypSlideOutMenu.Registry = []
ypSlideOutMenu.aniLen = 600
ypSlideOutMenu.hideDelay = 600
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('left:' + left + 'px; ')
                d.write('top:' + top + 'px; ')
                d.write('overflow:hidden; }')
                d.write('#' + this.id + 'Container, #' + this.id + 'Content { position:absolute; z-index:5;')
                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 + "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 + "')")

                //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() { }