var timerlen 	= 5;
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 slide(objname)
{
	
	if(moving[objname])	return;
	moving[objname] = true;

	if(document.getElementById(objname).style.display != "none")	dir[objname] = "up";
	else															dir[objname] = "down";
		
	obj[objname] = document.getElementById(objname);
	
	endHeight[objname] = parseInt(obj[objname].style.height);
	
	//endHeight[objname] = document.getElementById(objname).offsetHeight	 
	
	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;
}