// courseview File
function levelShow(lev){
var objs, objh, objr;
objh = document.getElementById("def");
objh.style.display = 'none';
for (x=1; x<10; x++){
	did = 'r' + x;
	objr = document.getElementById(did);
	objr.style.display = 'none';
}
objs = document.getElementById(lev);
objs.style.display = 'block';
}
function levelHide(lev){
var objs, objh;
objh = document.getElementById("def");
objh.style.display = 'block';
objs = document.getElementById(lev);
objs.style.display = 'none';
}
function courseShow(cid){
var objc, objh, objr;
objh = document.getElementById("def");
objh.style.display = 'none';
for (x=1; x<10; x++){
	did = 'r' + x;
	objr = document.getElementById(did);
	objr.style.display = 'none';
}
objc = document.getElementById(cid);
objc.style.display = 'block';
}
function courseHide(cid){
var objc, objh;
objh = document.getElementById("def");
objh.style.display = 'block';
objc = document.getElementById(cid);
objc.style.display = 'none';
}