var timerlen = 5;
var slideAniLen = 5000;
 
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 toggleSlide(objname){
  if(document.getElementById(objname).style.display == "none"){
    // div is hidden, so let's slide down
	if (objname == 'login'){
		document['objname'].src = "images/member_login_btn_go_up";
	}
	alert(objname);
    slideshow(objname);
 
  }else{
    // div is not hidden, so slide up
	if (objname == 'login'){
		document['objname'].src = "images/member_login_btn_go_down";
	}
	slidehide(objname);
  }
}
 
function slideshow(objname){
	if (moving[objname]){
		return;
	}
 
	if (document.getElementById(objname).style.display != "none"){
		return;
	}
 
		moving[objname] = true;
		dir[objname] = "down";
		startslide(objname);		
}
 
function slidehide(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 > 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;
 
}
 

 
obj[objname].style.height = d + "px";