function activer(){
	if(document.getElementById("xpert").checked){
		document.getElementById("kernel").disabled = true;
		document.getElementById("control").disabled = true;
		document.getElementById("kernel").checked = false;
		document.getElementById("control").checked = false;
	}else if(document.getElementById("kernel").checked){
		document.getElementById("xpert").disabled = true;
		document.getElementById("control").disabled = false;
		document.getElementById("xpert").checked = false;
		document.getElementById("control").checked = false;
	}else{
		document.getElementById("xpert").disabled = false;
		document.getElementById("kernel").disabled = false;
		document.getElementById("control").disabled = true;
		document.getElementById("control").checked = false;
	}
}