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 = false;
}
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);
			//alert(this.parentNode.title);
		};
	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();
		}
	}, 30);
	this.collapseOthers(submenu);
};
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) {
		for (var i = 0; i < this.submenus.length; i++)
			if (this.submenus[i] != submenu && this.submenus[i].className != "collapsed")
				this.collapseMenu(this.submenus[i]);
				
				var tony = ltrim(so_getText(submenu))
				var pos = tony.indexOf('About Us');
				if (pos==0){
					javascript:loadcontent('AboutUs');
				}
				var pos = tony.indexOf('Social & Economic');
				if (pos==0){
					javascript:loadcontent('SocialEconomic');
				}
				var pos = tony.indexOf('Employment');
				if (pos==0){
					javascript:loadcontent('Employment');
				}
				var pos = tony.indexOf('Environment & Practice');
				if (pos==0){
					javascript:loadcontent('EnvironmentPractice');
				}
				var pos = tony.indexOf('Plantations & Water');
				if (pos==0){
					javascript:loadcontent('PlantationsWater');
				}
				var pos = tony.indexOf('Resource & Infrastructure');
				if (pos==0){
					javascript:loadcontent('ResourceInfrastructure');
				}
				var pos = tony.indexOf('Reference Material');
				if (pos==0){
					javascript:loadcontent('ReferenceMaterial');
				}
				var pos = tony.indexOf('Pictorials');
				if (pos==0){
					javascript:loadcontent('Pictorials');
				}
				
		}	
	
};

function so_getText(obj) {
    if (obj.nodeType == 3) return obj.nodeValue;
    var txt = new Array(),i=0;
	while(obj.childNodes[i]) {
		txt[txt.length] = so_getText(obj.childNodes[i]);
		i++;
	}
    return txt.join("");
}

function Asc(String){
	return String.charCodeAt(0);
}

function ltrim(str){
    return str.replace(/^\s+/, '');
}


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=/";
	}
};