var timerlen = 1;
var slideSpeed = 1000;
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;
	moving[objname] = true;
	dir[objname] = "down";
	startslide(objname);
}

function slideup(objname){
	if(moving[objname]) return;
	if(document.getElementById(objname).style.display == "none") return;
	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 > slideSpeed)
		endSlide(objname)
	else {
		var d =Math.round(elapsed / slideSpeed * 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;
}


function toggleSlide(objname){
	if (document.getElementById(objname).style.display == "none"){
		slidedown(objname);
	} else {
		//slideup(objname);
	}
}