function newsview1(){
	var viewtopics = document.getElementById('viewtopics');
	var viewinfo = document.getElementById('viewinfo');
	var viewevent = document.getElementById('viewevent');
	var viewmainte = document.getElementById('viewmainte');

	viewtopics.style.display="block";
	viewinfo.style.display="none";
	viewevent.style.display="none";
	viewmainte.style.display="none";
}

function newsview2(){
	var viewtopics = document.getElementById('viewtopics');
	var viewinfo = document.getElementById('viewinfo');
	var viewevent = document.getElementById('viewevent');
	var viewmainte = document.getElementById('viewmainte');

	viewtopics.style.display="none";
	viewinfo.style.display="block";
	viewevent.style.display="none";
	viewmainte.style.display="none";
}

function newsview3(){
	var viewtopics = document.getElementById('viewtopics');
	var viewinfo = document.getElementById('viewinfo');
	var viewevent = document.getElementById('viewevent');
	var viewmainte = document.getElementById('viewmainte');

	viewtopics.style.display="none";
	viewinfo.style.display="none";
	viewevent.style.display="block";
	viewmainte.style.display="none";
}
function newsview4(){
	var viewtopics = document.getElementById('viewtopics');
	var viewinfo = document.getElementById('viewinfo');
	var viewevent = document.getElementById('viewevent');
	var viewmainte = document.getElementById('viewmainte');

	viewtopics.style.display="none";
	viewinfo.style.display="none";
	viewevent.style.display="none";
	viewmainte.style.display="block";
}