var expanding = false;

function SDMenu(id) {
	if (!document.getElementById || !document.getElementsByTagName)
		return false;
	this.menu = document.getElementById(id);
	this.submenus = this.menu.getElementsByTagName("div");
	this.remember = true;
	this.speed = 3;
	this.markCurrent = true;
	this.oneSmOnly = true;

}
SDMenu.prototype.init = function() {
	var mainInstance = this;
	for (var i = 0; i < this.submenus.length; i++)
		this.submenus[i].getElementsByTagName("span")[0].onclick = function() {
			mainInstance.toggleMenu(this.parentNode);
		};
	if (this.markCurrent) {
		var links = this.menu.getElementsByTagName("a");
		for (var i = 0; i < links.length; i++)
			if (links[i].href == document.location.href) {
				links[i].className = "current";
				break;
			}
	}
	if (this.remember) {
		var regex = new RegExp("sdmenu_" + encodeURIComponent(this.menu.id) + "=([01]+)");
		var match = regex.exec(document.cookie);
		if (match) {
			var states = match[1].split("");
			for (var i = 0; i < states.length; i++)
				this.submenus[i].className = (states[i] == 0 ? "collapsed" : "");
		}
	}
};
SDMenu.prototype.toggleMenu = function(submenu) {
	if (submenu.className == "collapsed") {
		this.expandMenu(submenu);
	} else
		this.collapseMenu(submenu);
};
SDMenu.prototype.expandMenu = function(submenu) {
	    var fullHeight = submenu.getElementsByTagName("span")[0].offsetHeight;
	    var links = submenu.getElementsByTagName("a");
	    for (var i = 0; i < links.length; i++)
		    fullHeight += links[i].offsetHeight;
	    var moveBy = Math.round(this.speed * links.length);
    	
	    var mainInstance = this;
	    var intId = setInterval(function() {
		    var curHeight = submenu.offsetHeight;
		    var newHeight = curHeight + moveBy;
		    if (newHeight < fullHeight)
			    submenu.style.height = newHeight + "px";
		    else {
			    clearInterval(intId);
			    submenu.style.height = "";
			    submenu.className = "";
			    mainInstance.memorize();
		    }
		    mainInstance.collapseOthers(submenu);
	    }, 30);
	    
};
SDMenu.prototype.collapseMenu = function(submenu) {
	var minHeight = submenu.getElementsByTagName("span")[0].offsetHeight;
	var moveBy = Math.round(this.speed * submenu.getElementsByTagName("a").length);
	var mainInstance = this;
	var intId = setInterval(function() {
		var curHeight = submenu.offsetHeight;
		var newHeight = curHeight - moveBy;
		if (newHeight > minHeight)
			submenu.style.height = newHeight + "px";
		else {
			clearInterval(intId);
			submenu.style.height = "";
			submenu.className = "collapsed";
			mainInstance.memorize();
		}
	}, 30);
};
SDMenu.prototype.collapseOthers = function(submenu) {
	if (this.oneSmOnly && submenu.childNodes[0].className != "yearlevel") {
		for (var i = 0; i < this.submenus.length; i++) {
		    if (this.submenus[i] != submenu && this.submenus[i].childNodes[0].className != "yearlevel") {
			    if (this.submenus[i] != submenu && this.submenus[i].className != "collapsed")
				    this.collapseMenu(this.submenus[i]);
	        }
	    }
	}
};
SDMenu.prototype.expandAll = function() {
	var oldOneSmOnly = this.oneSmOnly;
	this.oneSmOnly = false;
	for (var i = 0; i < this.submenus.length; i++)
		if (this.submenus[i].className == "collapsed")
			this.expandMenu(this.submenus[i]);
	this.oneSmOnly = oldOneSmOnly;
};
SDMenu.prototype.collapseAll = function() {
	for (var i = 0; i < this.submenus.length; i++)
		if (this.submenus[i].className != "collapsed")
			this.collapseMenu(this.submenus[i]);
};
SDMenu.prototype.memorize = function() {
	if (this.remember) {
		var states = new Array();
		for (var i = 0; i < this.submenus.length; i++)
			states.push(this.submenus[i].className == "collapsed" ? 0 : 1);
		var d = new Date();
		d.setTime(d.getTime() + (30 * 24 * 60 * 60 * 1000));
		document.cookie = "sdmenu_" + encodeURIComponent(this.menu.id) + "=" + states.join("") + "; expires=" + d.toGMTString() + "; path=/";
	}
};




function SDNavMenu(id) {
	if (!document.getElementById || !document.getElementsByTagName)
		return false;
	this.menu = document.getElementById(id);
	this.submenus = this.menu.getElementsByTagName("span");
	this.remember = false;
	this.speed = 1;
	this.markCurrent = true;
	this.oneSmOnly = false;
}

SDNavMenu.prototype.init = function() {
	var mainInstance = this;
	for (var i = 0; i < this.submenus.length; i++)
		this.submenus[i].onclick = function() {
			mainInstance.toggleMenu(this.parentNode);
		};
	if (this.remember) {
		var regex = new RegExp("snavmenu_" + encodeURIComponent(this.menu.id) + "=([01]+)");
		var match = regex.exec(document.cookie);
		if (match) {
			var states = match[1].split("");
			for (var i = 0; i < states.length; i++)
				this.submenus[i].className = (states[i] == 0 ? "collapsedmenu" : "");
		}
	}
};
SDNavMenu.prototype.toggleMenu = function(submenu) {
	if (submenu.className == "collapsedmenu")
		this.expandMenu(submenu);
	else
		this.collapseMenu(submenu);
};
SDNavMenu.prototype.expandMenu = function(submenu) {
	var fullHeight = submenu.getElementsByTagName("span")[0].offsetHeight;
	var links = submenu.getElementsByTagName("a");
	for (var i = 0; i < links.length; i++)
		fullHeight += links[i].offsetHeight;
	var moveBy = Math.round(this.speed * links.length);
	
	var mainInstance = this;
	var intId = setInterval(function() {
		var curHeight = submenu.offsetHeight;
		var newHeight = curHeight + moveBy;
		if (newHeight < fullHeight)
			submenu.style.height = newHeight + "px";
		else {
			clearInterval(intId);
			submenu.style.height = "";
			submenu.className = "";
			mainInstance.memorize();
		}
	}, 30);
	this.collapseOthers(submenu);
};
SDNavMenu.prototype.collapseMenu = function(submenu) {
    var tbl = submenu.parentElement.parentElement.parentElement.parentElement.parentElement.nextSibling.getElementsByTagName("div")[0];
	//var minHeight = tbl.offsetHeight;
	var minHeight = 0;
	var moveBy = Math.round(this.speed * tbl.getElementsByTagName("a").length);
	var mainInstance = this;
	var intId = setInterval(function() {
		var curHeight;
		//if (tbl.style.height != "") {
		//    curHeight = tbl.style.height.substring(0, tbl.style.height.length - 2);
		//} else {
		    curHeight = tbl.offsetHeight;
		//}
		var newHeight = curHeight - moveBy;
		if (newHeight > minHeight)
			tbl.style.height = newHeight + "px";
		else {
			clearInterval(intId);
			//tbl.style.height = "";
			tbl.className = "collapsedmenu";
			mainInstance.memorize();
		}
	}, 30);
};
SDNavMenu.prototype.collapseOthers = function(submenu) {
	if (this.oneSmOnly) {
		for (var i = 0; i < this.submenus.length; i++)
			if (this.submenus[i] != submenu && this.submenus[i].className != "collapsedmenu")
				this.collapseMenu(this.submenus[i]);
	}
};
SDNavMenu.prototype.expandAll = function() {
	var oldOneSmOnly = this.oneSmOnly;
	this.oneSmOnly = false;
	for (var i = 0; i < this.submenus.length; i++)
		if (this.submenus[i].className == "collapsedmenu")
			this.expandMenu(this.submenus[i]);
	this.oneSmOnly = oldOneSmOnly;
};
SDNavMenu.prototype.collapseAll = function() {
	for (var i = 0; i < this.submenus.length; i++)
		if (this.submenus[i].className != "collapsedmenu")
			this.collapseMenu(this.submenus[i]);
};
SDNavMenu.prototype.memorize = function() {
	if (this.remember) {
		var states = new Array();
		for (var i = 0; i < this.submenus.length; i++)
			states.push(this.submenus[i].className == "collapsedmenu" ? 0 : 1);
		var d = new Date();
		d.setTime(d.getTime() + (30 * 24 * 60 * 60 * 1000));
		document.cookie = "snavmenu_" + encodeURIComponent(this.menu.id) + "=" + states.join("") + "; expires=" + d.toGMTString() + "; path=/";
	}
};