// JavaScript Document
	window.addEvent('domready', function() {
		
	    var mySlide = new Slider($('opacity-area'), $('opacity-slider'), {  
	        steps: 150,  
	        wheel: 1,  
	        onChange: function(step){  
		
				checkPeople(step);
				$('opacity-slider').innerHTML = step;
				aantalPersonen = step;
	        },
			
			onComplete: function(step)
			{
			}
	    }).set(0);
	
	
	var seminarieId;
	var baseURL = site_root + "/";
	$('submit').setStyle("display","none");
	
	$$("#seminaries input").each(function(el, i)
	{
		el.addEvent("click", function(event)
		{
			seminarieId = el.value;
			
			new Ajax(baseURL+'ajax/ber_event_stap_1.php',{
		
				postBody:"id="+seminarieId+"&aantalPersonen="+aantalPersonen,
				onRequest: function(){
				},
				onFailure: function(response){
				},
				onComplete: function(response) {
				},
				evalScripts: true
		
			}).request();
			
			$('submit').setStyle("display","block");
			
		});
	});

	function checkPeople(value)
	{
		$$("#seminaries span").each(function(el, i)
		{
			var p = el.id.substring(el.id.indexOf("_")+1);
			
			if (p >= value)
			{
				el.setStyle('visibility','visible');
			}
			else
			{
				el.setStyle('visibility','hidden');
			}
		});
	}
	
	});