function showHide(e,visibleString,invisibleString){
		if(document.getElementById(e).style.visibility = 'hidden'){
		   document.getElementById(e).style.visibility = 'visible';
		   document.getElementById(e+'_trigger').innerHTML = visibleString;
		} else if(document.getElementById(e).style.visibility = 'visible') {
		   document.getElementById(e).style.visibility = 'hidden';
		   document.getElementById(e+'_trigger').innerHTML = invisibleString;
		}
	}
	
	function vote(choice){
		var ajaxRequest;
		try{
			ajaxRequest = new XMLHttpRequest();
		} catch (e){
			try{
				ajaxRequest = new ActiveXObject("Msxml2.XMLHTTP");
			} catch (e) {
				try{
					ajaxRequest = new ActiveXObject("Microsoft.XMLHTTP");
				} catch (e){
					alert("Uw broser heeft geen ondersteuning voor AJAX!");
					return false;
				}
			}
		}
		ajaxRequest.onreadystatechange = function(){
			if(ajaxRequest.readyState == 4){
				document.getElementById('voteOptions').innerHTML = ajaxRequest.responseText;
			}
		}
		ajaxRequest.open("GET", "/poll_vote.php?option="+choice+"&r="+Math.random(), true);
		ajaxRequest.send(null); 
	}