var timerlen = 5;
var slideAniLen = 500;

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")
            {
                slideup(objname); // cannot slide down something that is already visible
                return;
                }
        
        if (navigator.appName.indexOf("Microsoft")!=-1){
            // IE      
            var t = document.getElementById('Featured');
            var PosL = 0
            PosL = t.offsetLeft;
            var screenW = document.body.clientWidth;
            var pageMargin = ((screenW/2) - PosL)
            
           // if(navigator.userAgent.indexOf('Mac') != -1 && typeof document.gody.leftMargin != 'undefined') {
                PosL += pageMargin;
                // add the width of the element
                PosL += 250;
                // then subtract the width of the other element
                PosL -= 55
            //}  
          //  alert('IE');
            //PosL = PosL - t.scrollLeft;
           // alert(PosL);
            document.getElementById('FeaturedCommunities').style.left = PosL + 'px';
        } else {
            // Mozilla   
            document.getElementById('FeaturedCommunities').style.left = document.getElementById('Featured').offsetLeft - 87 + 'px';
            
        }
        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);
        startTime[objname] = (new Date()).getTime();

        if(dir[objname] == "down"){
                obj[objname].style.height = "1px";
        }

        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]);
                if(dir[objname] == "up")
                        d = endHeight[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 = endHeight[objname] + "px";

        delete(moving[objname]);
        delete(timerID[objname]);
        delete(startTime[objname]);
        delete(endHeight[objname]);
        delete(obj[objname]);
        delete(dir[objname]);

        return;
}