/*********************************************************/
/* Hellberg Safety menu script                           */
/* (C) Techromic SL. 2007                                */
/*********************************************************/

var menu, titles, submenus, arrows, bypixels;
var submenuItemsHeight = 24;
var heights = new Array();
var kaka = new cookie("menu");

var n = navigator.userAgent;
if(/Opera/.test(n)) bypixels = 2;
else if(/Firefox/.test(n)) bypixels = 3;
else if(/MSIE/.test(n)) bypixels = 2;

function slash_expandall()
{
    if (typeof menu!="undefined")
    {
	    for(i=0; i<Math.max(titles.length, submenus.length); i++)
	    {
		    titles[i].className="title";
		    arrows[i].src = "/expanded.gif";
		    submenus[i].style.display="";
		    submenus[i].style.height = heights[i]+"px";
	    }
    }
}

function slash_contractall()
{
    if (typeof menu!="undefined")
    {
	    for(i=0; i<Math.max(titles.length, submenus.length); i++)
	    {
		    titles[i].className="titlehidden";
		    arrows[i].src = "/collapsed.gif";
		    submenus[i].style.display="none";
		    submenus[i].style.height = 0;
	    }
    }
}

function init()
{
    menu = getElementsByClassName("sdmenu", "div", document)[0];
    titles = getElementsByClassName("title", "span", menu);
    submenus = getElementsByClassName("submenu", "div", menu);
    arrows = getElementsByClassName("arrow", "img", menu);
    for(i=0; i<Math.max(titles.length, submenus.length); i++) 
    {
        titles[i].onclick = gomenu;
        arrows[i].onclick = gomenu;
        heights[i] = submenus[i].getElementsByTagName("a").length * submenuItemsHeight;
    }
    
    if(kaka.load()==null)
    	slash_contractall();
      
    restore();
}

function restore() 
{
    if(kaka.load() != null) 
    {
        slash_expandall(); 
        var hidden = kaka.load().split(",");
        if(hidden[0]=="-1")
            slash_expandall();
        else
        {
            for(var i in hidden) 
            {
                titles[hidden[i]].className = "titlehidden";
                submenus[hidden[i]].style.height = "0px";
                submenus[hidden[i]].style.display = "none";
                arrows[hidden[i]].src = "/collapsed.gif";
            }
        }
    }
}

function gomenu(e) 
{
    if (!e)
        var e = window.event;
    var ce = (e.target) ? e.target : e.srcElement;
    var sm;
    for(var i in titles) 
    {
        if(titles[i] == ce || arrows[i] == ce)
            sm = i;
    }
    if(parseInt(submenus[sm].style.height) > parseInt(heights[sm])-2) 
    {
        hidemenu(sm);
    } 
    else if(parseInt(submenus[sm].style.height) < 2) 
    {
        titles[sm].className = "title";
        showmenu(sm);
    }
}

function hidemenu(sm) 
{
    var nr = submenus[sm].getElementsByTagName("a").length*bypixels;
    submenus[sm].style.height = (parseInt(submenus[sm].style.height)-nr)+"px";
    var to = setTimeout("hidemenu("+sm+")", 30);
    if(parseInt(submenus[sm].style.height) <= nr) 
    {
        clearTimeout(to);
        submenus[sm].style.display = "none";
        submenus[sm].style.height = "0px";
        arrows[sm].src = "/collapsed.gif";
        titles[sm].className = "titlehidden";
    }
}

function showmenu(sm) 
{
    var nr = submenus[sm].getElementsByTagName("a").length*bypixels;
    submenus[sm].style.display = "";
    submenus[sm].style.height = (parseInt(submenus[sm].style.height)+nr)+"px";
    var to = setTimeout("showmenu("+sm+")", 30);
    if(parseInt(submenus[sm].style.height) > (parseInt(heights[sm])-nr)) 
    {
        clearTimeout(to);
        submenus[sm].style.height = heights[sm]+"px";
        arrows[sm].src = "/expanded.gif";
    }
        
        
}

function store() 
{
    var hidden = new Array();
    for(var i in titles) 
    {
        if(titles[i].className == "titlehidden")
            hidden.push(i);
    }
    kaka.save(hidden.join(","));
}

function getElementsByClassName(strClassName, strTagName, oElm)
{
    var arrElements = (strTagName == "*" && document.all)? document.all : oElm.getElementsByTagName(strTagName);
    var arrReturnElements = new Array();
    strClassName = strClassName.replace(/\-/g, "\\-");
    var oRegExp = new RegExp("(^|\\s)" + strClassName + "(\\s|$)");
    var oElement;
    for(var i=0; i<arrElements.length; i++)
    {
        oElement = arrElements[i];      
        if(oRegExp.test(oElement.className))
        {
            arrReturnElements.push(oElement);
        }   
    }
    return (arrReturnElements)
}

// Global cookie class

function cookie(name)
{
    this.name = name;
    this.save = save;
    this.load = load;
}

function save(value)
{
    var expire = new Date();
    expire.setDate(expire.getDate()+1);
    if(value=="") value="-1";
    var kaka = this.name + "=" + escape(value) + ";PATH=/;expires="+expire;
    document.cookie = kaka;
}

function load()
{
    if(document.cookie.length > 0) 
    {
        var c_start = document.cookie.indexOf(this.name + "=");
        if(c_start != -1) 
        {
            c_start = c_start + this.name.length + 1;
            var c_end = document.cookie.indexOf(";",c_start);
            if(c_end == -1)
                c_end = document.cookie.length;
            return unescape(document.cookie.substring(c_start, c_end));
        }
    }
    
    return null;
}

window.onload = init;
window.onunload = store;