var ui_accordion = new Object();

ui_accordion["mouseout"] = function ()
{
    removeClass(this,"hover");
    return false;
}

ui_accordion["mousedown"] = function ()
{
    this.timer = setTimeout("void(0)",0);
    var k = 0;
    var mb = this.mb;
    
    var dds = mb.parentNode.getElementsByTagName("dd");
    var dts = mb.parentNode.getElementsByTagName("dt");
    
    if( this.parentNode.getAttribute("standalone") != null )
    {
        var do_expand = (mb.offsetHeight>1)?false:true;
        
        var action = function()
        {
            clearTimeout(this.timer);
            
            if( do_expand )
			{
			    if(	mb.offsetHeight < (mb.scrollHeight-5) )
			    {
			        mb.style.height = Math.ceil(
			        mb.offsetHeight +  (mb.scrollHeight-mb.offsetHeight) / 7 ) + "px";
			        this.timer = setTimeout(action,0);
				}
				else
				{
				    mb.style.height = "auto";
					mb.style.overflow = "visible";
					do_expand = null;
					action = null;
					mb = null;
				}
            }
            else //do collapse
            {
                if(	 parseInt(mb.style.height) > 3)
                {
                    mb.style.height = Math.ceil( parseInt(mb.style.height) +  (- parseInt(mb.style.height)) / 2 ) + "px";
					window.status =  mb.style.height + new Date();
					this.timer = setTimeout(action,0);
				}
				else
				{
				    mb.style.height="0";
					mb.style.overflow ="hidden";
					mb.style.display = "none";
					do_expand = null;
					action = null;
					mb = null;
				}
            }
        }
        
        if(do_expand) //begin expand
		{
		    mb.style.height="1px";
			mb.style.overflow ="auto";
			mb.style.display="block";
		}
		else //begin collapse
		{
		    mb.style.height= mb.offsetHeight + "px";
			mb.style.overflow ="hidden";
			mb.style.display="block";
        }
        
        clearTimeout(this.timer);
		this.timer = setTimeout(action,0);
		return false;
    }
    
    var hasExpendedDD = false;
	for( var i=0;i<dds.length;i++ )
	{
	    dds[i].ddIndex = i;
		var closed,expand,collapse ;
		var collapsed = false;
		
		if( dds[i] == mb)
		{
		    if( dts[mb.ddIndex] )
		    {
		        addClass(dts[mb.ddIndex],"expanding");
		    }
		    
		    var start = new Date();
		    expand = function()
			{
			    clearTimeout(this.timer);
			    
			    if( mb.style.display.toLowerCase()!="block" )
				{
				    mb.style.display="block";
					mb.endHeight =  mb.scrollHeight;
					mb.style.overflow ="hidden";
				}
				
				var end = new Date();

				if( (mb.offsetHeight < mb.endHeight) && ((end - start)<500) )
				{
				    mb.style.height = Math.ceil( mb.offsetHeight + (mb.endHeight- mb.offsetHeight) / 33 ) + "px";
					this.timer = setTimeout(expand,0);
				}
				else
				{
				    mb.style.height="auto";
					mb.style.overflow="auto";
					if( dts[mb.ddIndex] )
					{
					    removeClass(dts[mb.ddIndex],"expanding");
                    }
				}
            }
        }
        else if(    dds[i].offsetHeight>0   )
		{
		    hasExpendedDD = true;
			collapsed = true;
			closed = dds[i];
			closed.style.height = closed.offsetHeight+"px";
			closed.style.overflow ="hidden";
			addClass(closed,"collapsing");
		
			if( dts[closed.ddIndex] )
			{
			    addClass(dts[closed.ddIndex],"collapsing");
			}
			
			var start = new Date();
			collapse = function()
			{
			    clearTimeout(this.timer);
				var ph = parseInt(closed.style.height);
				var end = new Date();
				
				if( (ph > 2) && ((end - start)<200) )
				{
				    closed.style.height =Math.floor(ph  + (0-ph)/2)  + "px";
					this.timer = setTimeout(collapse,0);
				}
				else
				{
				    closed.style.height="0";
					closed.style.display="none";
					closed.style.overflow ="visible";
					
					if( dts[closed.ddIndex] )
					{
					    removeClass(dts[closed.ddIndex],"collapsing");
						removeClass(closed,"collapsing");
					}
					
					this.timer = setTimeout(expand,0);
				}
			}
			
			clearTimeout(this.timer);
			this.timer = setTimeout( collapse,0);
        }
    }
    
	if( collapsed==false )
	{
	    if( dts[mb.ddIndex] )
	    {
	        removeClass(dts[mb.ddIndex],"expanding");
        }
    }
    
    if( hasExpendedDD == false )
	{
	    for( var i=0;i<dds.length;i++ )
		{
		    closed = dds[i];
			closed.style.height = 0;
			closed.style.overflow ="visible";
			removeClass(closed,"default_close");
			closed.style.display="none";
        }
        
        this.timer = setTimeout(expand,0);
    }
    
    return false;
}

ui_accordion["mouseover"] = function (e,dt,doExpand)
{
    var el;
    
    if( dt )
    {
        el = dt;
    }
    else
    {
        e =  getEvent(e);
        el =  getObjByClass(e.target,"dt","",2) ;
    }
    
    if( el && el.parentNode && hasClass(el.parentNode,"accordion") )
    {
        var def = getChildByClass(el.parentNode,"dd","default",1);
        
        if( !def )
        {
            if( el.parentNode.getElementsByTagName("dd").length>0 )
            {
                var dd = el.parentNode.getElementsByTagName("dd")[0];
                addClass(dd ,"default");
                addClass(dd ,"default_close");
            }
            else
            {
                return;
            }
        }
        
        if( !doExpand )
        {
            addClass(el,"hover");
        }
        
        if( el.init==null )
        {
            var mb = getNextObjByTagName(el,"dd");
            if(mb==null)
            {
                return;
            }
            
            el.mb = mb;
            el.init = true;
            el.onmouseout =ui_accordion["mouseout"];
            el.onmousedown =ui_accordion["mousedown"];
            el.expand = ui_accordion["mousedown"];
        }
        
        if( doExpand )
        {
            el.expand();
        }
        
        if( e )
        {
            return stopEvent(e);
        }
    }
}

var init = addEvent(document,"mouseover",ui_accordion["mouseover"]);
if(init)
{
    document.write("<style media=\"screen\"> dl.accordion dd{height:0;display:none;}; </style>");
}

function accordion_menu_expand(accordion_header_id)
{
    var el  = document.getElementById(accordion_header_id);
    
    if( !el )
    {
        return false;
    }
    
    if( el.tagName.toLowerCase()!="dt" )
    {
        return false;
    }
    
    ui_accordion["mouseover"](null,el,true);
}