function doSlide(id){
	timeToSlide = 15; // in milliseconds
	obj = document.getElementById(id);
	if(obj.style.display == "none"){ // si c hidden on fait le slide
		obj.style.visibility = "hidden";
		obj.style.display = "block";
		height = obj.offsetHeight;
		obj.style.height="0px";
		obj.style.visibility = "visible";
		pxPerLoop = height/timeToSlide;
		slide(obj,0,height,pxPerLoop,'down');
	} else {
		height = obj.offsetHeight;
		pxPerLoop = height/timeToSlide;
		slide(obj,height,height,pxPerLoop,'up');
	}
}

function slide(obj,offset,full,px,direction){
	if(direction == 'down'){
		if(offset < full){
			obj.style.height = offset+"px";
			offset=offset+px;
			setTimeout((function(){slide(obj,offset,full,px,'down');}),1);
		} else {
			obj.style.height = "auto"; //Can be usefull in updated divs otherwise
			//just use full+"px"
		}
	}else if(direction == 'up'){
		if(offset > 5){
			obj.style.height = offset+"px";
			offset=offset-px;
			setTimeout((function(){slide(obj,offset,full,px,'up');}),1);
		} else {
			obj.style.display = "none";
			obj.style.height = height+"px";
		}
	}
}