var test=mlaunch.mNavState.mChoice[i]; 
var test=null; if (mlaunch.mNavState.mChoice!=null) { test=mlaunch.mNavState.mChoice[i]; } 
function updateNav() {	var tree=msequencer.mSeqTree.mActivityMap;	var disable;	for (i in tree) {		var disable=true;		var test=mlaunch.mNavState.mChoice[i];		if (test) {			if (test['mIsSelectable']==true) { 				disable=false;			} else {				disable=true;			}		}		var elm = all(ITEM_PREFIX + tree[i].mActivityID);		toggleClass(elm, 'disabled', disable); 				//toggleClass(elm.parentNode, 'hidden', item.hidden);	}}
6251	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/6251/dbfa3ca1312cc116b768fc5d6903eb270a0bf47a/main.js/clean/Modules/Scorm2004/scripts/main.js