dropMenu.Registry = []

dropMenu.aniLen = 250

dropMenu.hideDelay = 350

dropMenu.minCPUResolution = 5

// constructor



//fires on instantiation of each new menu object

function dropMenu(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 = "dropMenu_"+id

	eval(this.gRef+"=this")

	dropMenu.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()

	}

}

dropMenu.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) / dropMenu.aniLen / dropMenu.aniLen 

// set event handlers.

if (this.ns4) this.menu.captureEvents(Event.MOUSEOVER | Event.MOUSEOUT);

this.menu.onmouseover = new Function("dropMenu.showMenu('" + this.id + "')")

this.menu.onmouseout = new Function("dropMenu.hideMenu('" + this.id + "')")

//set initial state

this.endSlide()

}

}

dropMenu.showMenu = function(id)

{

var reg = dropMenu.Registry

var obj = dropMenu.Registry[id]

if (obj.container) {

obj.over = true

for (menu in reg) if (id != menu) dropMenu.hide(menu)

if (obj.hideTimer) { reg[id].hideTimer = window.clearTimeout(reg[id].hideTimer) }

if (!obj.open && !obj.aniTimer) reg[id].startSlide(true)

}

}

dropMenu.hideMenu = function(id)

{

var obj = dropMenu.Registry[id]

if (obj.container) {

if (obj.hideTimer) window.clearTimeout(obj.hideTimer)

obj.hideTimer = window.setTimeout("dropMenu.hide('" + id + "')", dropMenu.hideDelay);

}

}

dropMenu.hideAll = function()

{

var reg = dropMenu.Registry

for (menu in reg) {

dropMenu.hide(menu);

if (menu.hideTimer) window.clearTimeout(menu.hideTimer);

}

}

dropMenu.hide = function(id)

{

var obj = dropMenu.Registry[id]

obj.over = false

if (obj.hideTimer) window.clearTimeout(obj.hideTimer)

obj.hideTimer = 0

if (obj.open && !obj.aniTimer) obj.startSlide(false)

}

dropMenu.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()", dropMenu.minCPUResolution)

}

dropMenu.prototype.slide = function() {

var elapsed = (new Date()).getTime() - this.startTime

if (elapsed > dropMenu.aniLen) this.endSlide()

else {

var d = Math.round(Math.pow(dropMenu.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)

}

}

dropMenu.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)

}

}

dropMenu.prototype.setVisibility = function(bShow) { 

var s = this.ns4 ? this.container : this.container.style

s.visibility = bShow ? "visible" : "hidden"

}

dropMenu.prototype.moveTo = function(p) { 

this.style[this.orientation == "h" ? "left" : "top"] = this.ns4 ? p : p + "px"

}

dropMenu.prototype.getPos = function(c) {

return parseInt(this.style[c])

}

dropMenu.prototype.onactivate = function() {}

dropMenu.prototype.ondeactivate = function() { }