function menuOver(id) {
	document.getElementById('m'+id).className = 'over';
}
function menuOut(id) {
	document.getElementById('m'+id).className = 'menu';
}

function openCenteredWindow(URL, name, width, height, resizable, status, scrollbars, menubar, dependent) {
	if(name == null) name = '';
	if(resizable == null) resizable = 'no';
	if(status == null) status = 'no';
	if(scrollbars == null) scrollbars = 'no';
	if(menubar == null) menubar = 'no';
	if(dependent == null) dependent = 'no';

	var left = (screen.availWidth - width)/2;
	var top = (screen.availHeight - height)/2;
	var features = 'height='+height+',width='+width+',innerHeight='+height+',innerWidth='+width+',left='+left+',top='+top+',screenX='+left+',screenY='+top+',resizable='+resizable+',status='+status+',scrollbars='+scrollbars+',menubar='+menubar+',dependent='+dependent;
	theWin = window.open(URL, name, features);
	theWin.focus();
}