function Tabswitch(tabname){
	//reset tabs
	document.getElementById('News-tab1').className = 'News-tab1';
	document.getElementById('News-tab2').className = 'News-tab2';
	document.getElementById('News-tab3').className = 'News-tab3';
	//select tabs
	if (tabname == "News-tab1"){
		document.getElementById('News1_content').style.visibility = "visible";
		document.getElementById('News1_content').style.display = "block";
		document.getElementById('News2_content').style.visibility = "hidden";
		document.getElementById('News2_content').style.display = "none";
		document.getElementById('News3_content').style.visibility = "hidden";
		document.getElementById('News3_content').style.display = "none";
	} 
	if (tabname == "News-tab2"){
		document.getElementById('News2_content').style.visibility = "visible";
		document.getElementById('News2_content').style.display = "block";
		document.getElementById('News1_content').style.visibility = "hidden";
		document.getElementById('News1_content').style.display = "none";
		document.getElementById('News3_content').style.visibility = "hidden";
		document.getElementById('News3_content').style.display = "none";
	}
		if (tabname == "News-tab3"){
		document.getElementById('News3_content').style.visibility = "visible";
		document.getElementById('News3_content').style.display = "block";
		document.getElementById('News1_content').style.visibility = "hidden";
		document.getElementById('News1_content').style.display = "none";
		document.getElementById('News2_content').style.visibility = "hidden";
		document.getElementById('News2_content').style.display = "none";
	}
	document.getElementById(tabname).className = tabname + " " + tabname + "_up";

	}