var xmlHttp

function stemmen(id, cijfer) {

	xmlHttp=GetXmlHttpObject();

	if (xmlHttp==null) {
  		alert ("Je browser ondersteund geen Ajax!!!");
 	 	return;
  	} 

	xmlHttp.open('POST', 'http://www.oinkoink.nl/stemmen.php', true);

	xmlHttp.onreadystatechange=stateChanged;

	var params = 'id=' + encodeURI(escape(id)) + '&cijfer=' + encodeURI(escape(cijfer));

	xmlHttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
	xmlHttp.setRequestHeader("Content-length", params.length);
	xmlHttp.setRequestHeader("Connection", "close");

	xmlHttp.send(params);

}

function stateChanged(value) {
		

    if (xmlHttp.readyState == 4) {
		document.getElementById("stem_weergave").innerHTML = xmlHttp.responseText;
	}   
}

function GetXmlHttpObject() {
	var xmlHttp=null;

	try	{
  		// Firefox, Opera 8.0+, Safari
  		xmlHttp=new XMLHttpRequest();
  	}
	catch (e){	
  		// Internet Explorer
  		try{
    		xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
    	}
  		catch (e){
    		xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
    	}
  	}

	return xmlHttp;
}


function updatepagina() {
   img = document.getElementById('norobot'); 
   img.src = 'http://www.oinkoink.nl/requires/captcha/captcha.php?' + Math.random();
}