rem: Element.remove(row); 
add: if (null != row) { Element.remove(row); } 
context:     this.deleteSession = function(uri, context) {        // delete the session        debug.print("deleteSession: " + uri);        if (confirm("Are you sure you want to delete this session?")) {            // call session-delete            var req = new Ajax.Request(deleteUrl,                {                    method: 'post',                    parameters: 'URI=' + uri,                    asynchronous: false,                    onFailure: reportError                });            // delete the item from the DOM            // context will be the button            var row = context.parentNode.parentNode;            Element.remove(row);        }    }
meta: 952	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/952/69dedb9c0ffc0c9e18f6293f86204bb722b72414/session.js/buggy/session.js