/*****************************************************
 * ypSOM
 * 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--
 *
 * Amended 12APR06 Julian Madle - Future Shock Ltd
 *
 *****************************************************/

ypSOM.Registry = []
ypSOM.minCPUResolution = 10
//ypSOM.aniLen = 600
//ypSOM.hideDelay = 400

// JM highlighting amendments - dirty but works in DOM browsers
var UnhighlightColor="#F9F8FF";
var HighlightColor="#F9F8FF";

function highlightLinks(ObjectList,HighlightState) {
	if (document.getElementById) {
		var ObjectArray=ObjectList.split(",");
		for (var i=0; i<ObjectArray.length; i++) {document.getElementById(ObjectArray[i]).style.backgroundColor = HighlightState=="on" ? HighlightColor : UnhighlightColor}
		}
	}

// constructor
function ypSOM(id, dir, left, top, width, height, aniLen, hideDelay) {
	this.aniLen = aniLen
	this.hideDelay = hideDelay
	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 = "ypSOM_"+id
		eval(this.gRef+"=this")
		// add this menu object to an internal list of all menus
		ypSOM.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; ')
		d.write('width:' + width + 'px; ')
		d.write('height:' + height + 'px; ')
		d.write('z-index:100; ')
		d.write('clip:rect(0 ' + width + ' ' + height + ' 0); ')
		d.write('}')
		d.write('</style>')
		this.load()
		}
	}

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

ypSOM.showMenu = function(id) {
	var reg = ypSOM.Registry
	var obj = ypSOM.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)
		}
	}

ypSOM.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 = ypSOM.Registry[id]
	if (obj.container) {
	   if (obj.hideTimer) window.clearTimeout(obj.hideTimer)
	   obj.hideTimer = window.setTimeout("ypSOM.hide('" + id + "')", obj.hideDelay);
	   }
	}

ypSOM.hide = function(id) {
	var obj = ypSOM.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)
	}

ypSOM.prototype.startSlide = function(open) {
	this[open ? "onactivate" : "ondeactivate"]()
	this.open = open
	if (open) this.setVisibility(true)
	this.startTime = (new Date()).getTime()
	// JM: added condition to disable scroll on hide menu
	if (open) {this.aniTimer = window.setInterval(this.gRef + ".slide()", ypSOM.minCPUResolution)}
	else {this.endSlide()}
	}

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

ypSOM.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)}
	}

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

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

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

// events
ypSOM.prototype.onactivate = function() {}
ypSOM.prototype.ondeactivate = function() {}