var timerlen = 5;
var slideAniLen = 250; //250

var timerID = new Array();
var startTime = new Array();
var obj = new Array();
var endHeight = new Array();
var moving = new Array();
var dir = new Array();

function slidedown(objname){
        if(moving[objname])
                return;

        if(document.getElementById(objname).style.display != "none")
	{
                return; // cannot slide down something that is already visible
	}

        moving[objname] = true;
        dir[objname] = "down";
        startslide(objname);
}

function slideup(objname){
        if(moving[objname])
                return;

        if(document.getElementById(objname).style.display == "none")
                return; // cannot slide up something that is already hidden

        moving[objname] = true;
        dir[objname] = "up";
        startslide(objname);
}

function startslide(objname){		

        obj[objname] = document.getElementById(objname);
        //endHeight[objname] = parseInt(obj[objname].style.height);
        endHeight[objname] = parseInt(obj[objname].offsetHeight + 10);

        document.getElementById(objname).style.overflow='hidden';
        //alert(endHeight[objname]);
        startTime[objname] = (new Date()).getTime();

        if(dir[objname] == "down"){
                obj[objname].style.height = "0px";
                obj[objname].style.visibility = "visible";
                obj[objname].style.overflow='visible';
                
        }
        obj[objname].style.display = "block";

        timerID[objname] = setInterval('slidetick(\'' + objname + '\');',timerlen);
}

function slidetick(objname){
        var elapsed = (new Date()).getTime() - startTime[objname];

        if (elapsed > slideAniLen)
                endSlide(objname)
        else {
                var d =Math.round(elapsed / slideAniLen * endHeight[objname]);
                var d =Math.round(elapsed / slideAniLen * div_heights[objname]);
                if(dir[objname] == "up")
                {
                        //d = endHeight[objname] - d;
                        d = div_heights[objname] - d;
                }
				obj[objname].style.height = d + "px";
        }

        return;
}

function endSlide(objname){
        clearInterval(timerID[objname]);

        if(dir[objname] == "up")
	{
                obj[objname].style.display = "none";
                obj[objname].style.height = 0 + 'px';
	}
	else
	{
        //obj[objname].style.height = endHeight[objname] + "px";
        obj[objname].style.height = div_heights[objname] + "px";
	}
        delete(moving[objname]);
        delete(timerID[objname]);
        delete(startTime[objname]);
        delete(endHeight[objname]);
        delete(obj[objname]);
        delete(dir[objname]);

        return;
}
function xtoggle(div)
{
	var obj = document.getElementById(div + '-menu_contents');
	//close all otehr open divs
	/*
	for(var i=0; i<menulist.length; i++)
	{
		if(menulist[i] !=div)
		{
				document.getElementById(menulist[i] + '-dd').innerHTML = "<a href=\"javascript:xtoggle('" +  menulist[i] + "' );\">+</a>";
				slideup(menulist[i]+ '-menu_contents');
		}
	}
	*/
	close_menus(div);

	if(obj.style.display=='block')
	{
		document.getElementById(div + '-dd').innerHTML = "<a href=\"javascript:xtoggle('" + div + "');\">+</a>";
		slideup(div + '-menu_contents');
	}
	else
	{
		document.getElementById(div + '-dd').innerHTML = "<a href=\"javascript:xtoggle('" + div + "');\">&ndash;</a>";
		slidedown(div + '-menu_contents');
	}
}
function currentMenu(div)
{
	if((div != 'no-menu-specified') && div !='menu-root' )
	{
		slidedown(div + "-menu_contents");
	}	
}
function close_menus(omit)
{
	 for(var i=0; i<menulist.length; i++)
        {
                if(menulist[i] != omit)
                {
                                document.getElementById(menulist[i] + '-dd').innerHTML = "<a href=\"javascript:xtoggle('" +  menulist[i] + "' );\">+</a>";
                                slideup(menulist[i]+ '-menu_contents');
                }
        }

}