/*****************************************************
 * 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           = 250;
ypSlideOutMenu.hideDelay        = 1000;
ypSlideOutMenu.minCPUResolution = 10;
ypSlideOutMenu.BehaviourState   = 0;

// 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;

	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();
    }
}

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;

	// close other menus.
	for (menu in reg) {
	    if (id != menu) {
		ypSlideOutMenu.hide(menu);
	    }
	}
				  
	// 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.BehaviourState = 0;", ypSlideOutMenu.hideDelay);
    }
}

ypSlideOutMenu.toggleMenu = function(id, flipstate) {
    var obj = ypSlideOutMenu.Registry[id]

    if(flipstate == 1) {

	// always toggle

	if(ypSlideOutMenu.BehaviourState == 0) {
	  ypSlideOutMenu.BehaviourState = 1;
	  ypSlideOutMenu.showMenu(id);
//document.onclick = clickAway;
	} else {
	  ypSlideOutMenu.BehaviourState = 0;
	  ypSlideOutMenu.hide(id, 0);

	}
    } else if(flipstate == 0) {
	// toggle if already open
	if(ypSlideOutMenu.BehaviourState == 1) {
	  ypSlideOutMenu.showMenu(id);
	}
    }
}

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])
}

// begin mouseover / hover image flipping, rmp 2005-12-19
ypSlideOutMenu.hover_grab = function(id) {
  var mb      = document.getElementById("menubar");
  var tr      = mb.getElementsByTagName("tr")[0];
  imgs        = tr.getElementsByTagName("img");

  id.match(/([\d]+)/);
  idx         = new Number(RegExp.$1)
  return imgs[idx-1];
}

ypSlideOutMenu.hover_in = function(id) {
  var img = ypSlideOutMenu.hover_grab(id);

  img.src.match(/^(.*)(\..*?)$/);
  var imghead = new String(RegExp.$1);
  var imgtype = new String(RegExp.$2);
  img.src     = imghead+"_hover"+imgtype;
}

ypSlideOutMenu.hover_out = function(id) {
  var img = ypSlideOutMenu.hover_grab(id);

  img.src.match(/^(.*)_hover(\..*?)$/);
  var imghead = new String(RegExp.$1);
  var imgtype = new String(RegExp.$2);
  img.src     = imghead+imgtype;
}
// end mouseover / hover image flipping

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

//if (this.ns4) document.captureEvents(Event.CLICK);
function clickAway(evt) {
  if (this.ns4) document.routeEvent(evt);

  for (menu in ypSlideOutMenu.Registry) {
    ypSlideOutMenu.hide(menu);
  }

  ypSlideOutMenu.BehaviourState = 0;
}