function showProg(id) {
	document.getElementById(id).style.display = "block";
}
		
function hideProg(id) {
	document.getElementById(id).style.display = "none";
}

function linkOff(id) {
	document.getElementById(id).className = "prog_list_off";
}

function linkOn(id) {
	document.getElementById(id).className = "prog_list_on";
}