rem: document.getElementById(id).style.display = 'none'; 
add: var ele = document.getElementById(id); if (ele == null) { alert("hideById() can't find an element with id: " + id + "."); throw id; }  ele.style.display = 'none'; 
context: function hideById(id){    document.getElementById(id).style.display = 'none';}
meta: 266	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/266/1c2e43c84790bfe925e41713280232cd61fc9288/util.js/clean/java/uk/ltd/getahead/dwr/util.js