var timerlen = 15;
var slideAniLen = 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"){ 
			slideup(objname);// }
             //   return; // cannot slide down something that is already visible
		} else {
			moving[objname] = true;
			dir[objname] = "down";
			startslide(objname);
		}
}

function slidedown2(objname){
        if(moving[objname]) return;		
		obj[objname] = document.getElementById(objname);
		obj[objname].style.height = (parseInt(obj[objname].offsetHeight) + 40) + "px";		
}

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);

		obj[objname].style.visibility = 'hidden';
		obj[objname].style.overflow = "hidden";
		obj[objname].style.display = "block";
        endHeight[objname] = parseInt(obj[objname].offsetHeight);
		//endHeight[objname] = '100px';
		obj[objname].style.display = "none";
		obj[objname].style.visibility = 'visible';
        //alert(endHeight[objname]);
		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";
				//alert(obj[objname].style.height);
        }

        return;
}

function endSlide(objname){
        clearInterval(timerID[objname]);
        if(dir[objname] == "up")
                obj[objname].style.display = "none";

        obj[objname].style.height = endHeight[objname] + "px";
		obj[objname].style.overflow = "visible";
        delete(moving[objname]);
        delete(timerID[objname]);
        delete(startTime[objname]);
        delete(endHeight[objname]);
        delete(obj[objname]);
        delete(dir[objname]);

        return;
}