function ht(tabid) {

	function reset_tabs() {
		document.getElementById("ht1_link").className = ("");
		document.getElementById("ht2_link").className = ("");
		document.getElementById("ht3_link").className = ("");
		document.getElementById("ht4_link").className = ("");
		document.getElementById("ht5_link").className = ("");
		document.getElementById("ht6_link").className = ("");
		document.getElementById("ht7_link").className = ("");
		document.getElementById("ht8_link").className = ("");
	}

	function reset_boxes() {
		ShowHide('ht1','none');
		ShowHide('ht2','none');
		ShowHide('ht3','none');
		ShowHide('ht4','none');
		ShowHide('ht5','none');
		ShowHide('ht6','none');
		ShowHide('ht7','none');
		ShowHide('ht8','none');
	}

	reset_boxes();
	reset_tabs();
	document.getElementById(tabid).className = ('selected');

}