function toggle_slide(element)
{       
	if (is_array(element))
	{                  
		for (var i = 0; i < element.length; i++)
		{                  
			new Effect.toggle($(element[i]), 'slide', {duration: 0.5});						
		}
	}                                           

	else
	{
		new Effect.toggle($(element), 'slide');					
	}
}             

function is_array() 
{
	if (typeof arguments[0] == 'object') 
	{  
		var criterion = arguments[0].constructor.toString().match(/array/i); 
		return (criterion != null);  
	}

	return false;
}