function switchquestions(theid) {
	var thearray= new Array("topads1", "topads2", "topads3", "topads4");
	for(i=0; i<thearray.length; i++){
		if(thearray[i] == theid){
			document.getElementById(theid).style.display="block";
			document.getElementById("l"+theid).className="active";
		}else {
			document.getElementById(thearray[i]).style.display="none";
			document.getElementById("l"+thearray[i]).className="";
		}
	}
}