var leftMenus = new Array();

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;

	if (leftMenus.length == 0)
	{
	    var leftMenuContainer = document.getElementById("left_cont");
        var leftMenusDiv = leftMenuContainer.getElementsByTagName("div");
        
        for (var i = 0; i < leftMenusDiv.length; i++) {
            var menuId = leftMenusDiv[i].getAttribute("id");
            if (menuId != null)
                leftMenus[i] = menuId;
        }  
    }

}
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) {
			if (document.location.href.indexOf(links[i].href) != -1) {
				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" : "");
		}
		else {
		    for (var i = 0; i < this.submenus.length; i++)
				this.submenus[i].className = "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]);
	    }
	    
	    if (leftMenus.length == 0)
	    {
	        var leftMenuContainer = document.getElementById("left_cont");
            var leftMenusDiv = leftMenuContainer.getElementsByTagName("div");
            
            for (var i = 0; i < leftMenusDiv.length; i++) {
                var menuId = leftMenusDiv[i].getAttribute("id");
                if (menuId != null)
                    leftMenus[i] = menuId;
            }  
        }
	    
	    //var d = new Date();
        if (leftMenus.length > 0)
        {
	        for (var i = 0; i < leftMenus.length; i++) {
	            if (leftMenus[i] != null) {
	                if (leftMenus[i] != "") {
	                    var leftmenu = document.getElementById(leftMenus[i]);
			            var leftsubmenus = leftmenu.getElementsByTagName("div");
                        var states = new Array();
                                        
                        for (var j = 0; j < leftsubmenus.length; j++) {
                            if (leftsubmenus[j] != submenu)
                            {
                                states.push(0); 
                                if (leftsubmenus[j].className != "collapsed") 
		                            this.collapseMenu(leftsubmenus[j]);
			                }
			            }
            			
			            //d.setTime(d.getTime() + (30 * 24 * 60 * 60 * 1000));
	    	            //document.cookie = "sdmenu_" + encodeURIComponent(leftMenus[i]) + "=" + states.join("") + "; expires=" + d.toGMTString() + "; path=/";
	    	            document.cookie = "sdmenu_" + encodeURIComponent(leftMenus[i]) + "=" + states.join("") + "; path=/";
	    	        }
	    	    }
	        }
	    }
    }	    
};
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=/";
		document.cookie = "sdmenu_" + encodeURIComponent(this.menu.id) + "=" + states.join("") + "; path=/";
	}
};