function menu (menu)
{
	var mbox = document.getElementById(menu);
	if (mbox.style.display=='block')
		mbox.style.display = 'none';
	else
		mbox.style.display = 'block';
}

function show (name)
{
	var el = document.getElementById(name);
	if (el.style.display=='none')
		el.style.display='block';
	else
		el.style.display='none';
}

function show_l (name)
{
	document.getElementById('forgot').style.display='none';
	document.getElementById('login').style.display='none';
	document.getElementById('signup').style.display='none';
	show (name);
}

function add_tag(tag,element)
{
	var el = document.getElementById(element);
	if (tag=="link")
		var message = "Please enter a full link url.";
	else if (tag=="img")
		var message = "Please enter full image url.";
	else if (tag=="youtube")
		var message = "Please enter youtube link. \n\n Example: http://www.youtube.com/watch?v=xxxxxx";
	else if (tag=="vimeo")
		var message = "Please enter vimeo link. \n\n Example: http://vimeo.com/xxxxxx";
	else
		return false;
		
	var userInput = prompt(message);
	
	if (userInput)
	{
		if (tag=="link")
			el.value = el.value + '[link]'+userInput+'[/link]';
		else if (tag=="img")
			el.value = el.value + '[img]'+userInput+'[/img]';
		else if (tag=="youtube")
		{
			var tmp = userInput.split("?");
			var tmp = tmp[1].split("&");
			var tmp = tmp[0].split("=");
			el.value = el.value + '[youtube]'+tmp[1]+'[/youtube]';
		}
		else if (tag=="vimeo")
		{
			var tmp = userInput.split("/");
			el.value = el.value + '[vimeo]'+tmp[3]+'[/vimeo]';
		}
		else
			return false;
	}
}

function validate_email(form)
{
   var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
   var email = document.getElementById(form).email.value;
   if(reg.test(email) == false) 
   {
      alert('Please enter a valid email address');
      return false;
   }
   else
	return true;
}