var timerlen = 5;
var slideAniLen = 100;

var timerID = new Array();
var startTime = new Array();
var obj = new Array();
var endHeight = new Array();
var moving = new Array();
var dir = new Array();

var prevSliderBoxOpen = "1";
var openThisSliderBox = 1;

var shouldCreateDragger = "yes"; // make this variable to "NO" if the scrollbar should not appear

function slide(objname){
	openThisSliderBox = objname;
	setTimeout('startSlide(\'' + objname + '\');',250);
	if(objname == '1'){
		document.getElementById('el'+objname).style.color = "#d20a12";
	}
}

function startSlide(objname){
	if ((prevSliderBoxOpen == objname) || (openThisSliderBox != objname))
		return;

	slideup(prevSliderBoxOpen);
	slidedown(objname);
	prevSliderBoxOpen = objname;
}

function slidedown(objname){
	objName = "el" + objname + "Child";
	if(moving[objName])
		return;

	if(document.getElementById('el' + objname + 'Child').style.display != "none")
		return;

	document.getElementById('el' + objname + 'Parent').style.color = "#d20a12";
	document.getElementById('el' + objname).style.color = "#d20a12";
	
	moving[objName] = true;
	dir[objName] = "down";
	startslide(objName);
}

function slideup(objname){
	objName = "el" + objname + "Child";
	if(moving[objName])
		return;

	if(document.getElementById('el' + objname + 'Child').style.display == "none")
		return;

	document.getElementById('el' + objname + 'Parent').style.color = "#333";
	document.getElementById('el' + objname).style.color = "#333";
	
	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]);

	for (x=1; x<articleCount+1; x++){
		if (prevSliderBoxOpen != x){
			if(document.getElementById('el' + x + 'Child')){
				document.getElementById('el' + x + 'Child').style.display = 'none';
			}
			if(document.getElementById('el' + x + 'Parent')){
				document.getElementById('el' + x + 'Parent').style.color = "#333";
			}
			if (document.getElementById('el'+x)){
				document.getElementById('el'+x).style.color = "#333";
			}		
		}
	}

	return;
}