var gTop=0;
var gIncVal=0;
var timeOutValue=10;
function scrollMe(arg) 
    {    
        var objEncNav=document.getElementById('encNav');
        var scrollAmount=240;
        var objEncNavHeight=parseInt(objEncNav.offsetHeight);
        var objEncNavTop=objEncNav.style.top;
        var barHeight=290;
        if(!objEncNavTop)
            objEncNavTop=0;
        else
            objEncNavTop=objEncNavTop.substring(0,objEncNavTop.length-2);
            if(arg>0)
                {
                    if(objEncNavTop>=0 || objEncNavTop>(-(objEncNavHeight-(barHeight+scrollAmount))))
                        {
                            incrementValue=scrollAmount;
                        }
                    else if(objEncNavTop<(-(objEncNavHeight-(barHeight+scrollAmount))))
                        {
                            incrementValue=(objEncNavHeight-barHeight)+parseInt(objEncNavTop);
                        }
                    else
                        {
                            incrementValue=0;
                        }
                    encSmoothScroll("minus", parseInt(objEncNavTop), parseInt(incrementValue));
                }
            else
                {
                    if(objEncNavTop<0 && ((parseInt(objEncNavTop)+scrollAmount) < 0))
                        {
                            incrementValue=scrollAmount;
                        }
                    else
                        {
                            incrementValue=-objEncNavTop-0;     
                        }
                    encSmoothScroll("plus", parseInt(objEncNavTop), parseInt(incrementValue));
                }
            }
        function encSmoothScroll(dir, currentVal, incValue)
            {
                gTop=currentVal;
                gIncVal=incValue;
                encScrollBy(dir, 0)
            }
        function encScrollBy(dir, val)
            { 
                if(val<gIncVal)
                    {
                        var tmpInc;
                        if((gIncVal-val)>1)      
                            {
                                tmpInc=Math.ceil((gIncVal-val)/10);
                                if(tmpInc <1)
                                tmpInc=1;
                            }
                        else
                            {
                                tmpInc=gIncVal-val;
                            }
                        val+=tmpInc;
                        var objEncNav=document.getElementById('encNav');
                        if(dir=="plus")
                            {
                                 objEncNav.style.top=gTop+val+"px";
                            }
                        else if(dir=="minus")
                            {
                                objEncNav.style.top=gTop-val+"px";
                            }
                        var t=setTimeout("encScrollBy('"+dir+"', "+val+");", timeOutValue);
                    }
                else
                    {
                        clearTimeout(t);
                    }
            }