var timerlen = 5;
var slideAniLen =1;

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

function slidedown(objname){
		if(moving[objname])
				return;

		if(document.getElementById(objname).style.display != "none")
				return; // cannot slide down something that is already visible

		moving[objname] = true;
		dir[objname] = "down";
		startslide(objname);
}

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);

		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";
				
				if(dir[objname] == "down") {obj[objname].style.top = topposition + endHeight[objname] - d +"px";}
					
				if(dir[objname] == "up") {obj[objname].style.top = topposition  +"px";}
		}
		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.top = topposition + "px";

		delete(moving[objname]);
		delete(timerID[objname]);
		delete(startTime[objname]);
		delete(endHeight[objname]);
		delete(obj[objname]);
		delete(dir[objname]);

		return;
}

function showmenu(id,nb,st) {
	if (st==0) { slideAniLen =1} else { slideAniLen =1;}
	for (var i=1;i<nb+1;i++) {
		if(moving['smenu'+i]){endSlide('smenu'+i);}
		if (i==id) {
			slidedown('smenu'+i);
			if (document.getElementById('menu'+i).className!='div_menu_sel') {
				document.getElementById('menu'+i).className='div_menu_rose';
			}		
		} else if (document.getElementById('menu'+i)) {
			slideup('smenu'+i);
			if (document.getElementById('menu'+i).className!='div_menu_sel') {
				document.getElementById('menu'+i).className='div_menu_gris';
			}		
		}
	}
	   return;
}

function back_menu(id,nb,st) {
	if (st==0) { slideAniLen =1} else { slideAniLen =1;}
	for (var i=1;i<nb+1;i++) {
		if(moving['smenu'+i]){endSlide('smenu'+i);}
		if (i==id) {
			slidedown('smenu'+i);
			if (document.getElementById('menu'+i).className!='div_menu_sel') {
				document.getElementById('menu'+i).className='div_menu_rose';
			}		
		} else if (document.getElementById('menu'+i)) {
			slideup('smenu'+i);
			if (document.getElementById('menu'+i).className!='div_menu_sel') {
				document.getElementById('menu'+i).className='div_menu_gris';
			}		
		}
	}
	   return;
}