Indexed DB add row

gistfile1.js

function addRow(title) {
  	var obj = { title: title }; // structure of the object to save
		
		var store = getObjectStore(DB_TABLE_NAME, 'readwrite');// get the object store allowing read and write
		var req;
		try {
			req = store.add(obj); // add row
		} catch (e) {
			throw e;
		}
		req.onsuccess = function (evt) { // success - display table columns
			displayRows(store);
		};
		req.onerror = function() { // fail - display error
			displayActionFailure(this.error);
		};
	}