isNS4 = (document.layers) ? true : false;
	isIE4 = (document.all && !document.getElementById) ? true : false;
	isIE5 = (document.all && document.getElementById) ? true : false;
	isNS6 = (!document.all && document.getElementById) ? true : false;



function getelementbyid(myid) {
   if (isNS4){
        objElement = document.layers[myid];
     }else if (isIE4) {
        objElement = document.all[myid];
     }else if (isIE5 || isNS6) {
             objElement = document.getElementById(myid);
     }
return(objElement);
}

function op(k){
	getelementbyid('all').style.display = "none";
	getelementbyid('social').style.display = "none";
	getelementbyid('econ').style.display = "none";
	getelementbyid('event').style.display = "none";
	getelementbyid('sport').style.display = "none";

	getelementbyid('all_other').style.display = "none";
	getelementbyid('social_other').style.display = "none";
	getelementbyid('econ_other').style.display = "none";
	getelementbyid('event_other').style.display = "none";
	getelementbyid('sport_other').style.display = "none";

	getelementbyid('all_3').style.display = "none";
	getelementbyid('social_3').style.display = "none";
	getelementbyid('econ_3').style.display = "none";
	getelementbyid('event_3').style.display = "none";
	getelementbyid('sport_3').style.display = "none";

	getelementbyid(k).style.display = "";
	getelementbyid(k+"_other").style.display = "";
	getelementbyid(k+"_3").style.display = "";
}