function sel(slc) {
	menuBox = document.getElementById(slc);

	menuBox.className = 'act';
	menuBox.onmouseover=function() {
		document.getElementById(slc).className = 'act';
	}
	menuBox.onmouseout=function() {
		document.getElementById(slc).className = '';
	}
	menuBox.onmousedown=function() {
		document.getElementById(slc).className = '';
	}
	return;
}