function nav1Active(k) {
	document.getElementById("l" + k).className = document.getElementById("l" + k).className + "a";
	document.getElementById("m" + k).className = document.getElementById("m" + k).className + "a";
	document.getElementById("r" + k).className = document.getElementById("r" + k).className + "a";
}

function nav1InActive(k) {
	document.getElementById("l" + k).className = document.getElementById("l" + k).className.substr(0, document.getElementById("l" + k).className.length - 1 );
	document.getElementById("m" + k).className = document.getElementById("m" + k).className.substr(0, document.getElementById("m" + k).className.length - 1 );
	document.getElementById("r" + k).className = document.getElementById("r" + k).className.substr(0, document.getElementById("r" + k).className.length - 1 );
}