rem: display ("error hook"); 
add: return debugTrap(frame, type, rv); 
context:     onExecute: function exehook (frame, type, rv) {        display ("error hook");    }
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/89326cbcdc6feb4eef3ffc00bb488c9640e8dd81/venkman-debugger.js/clean/extensions/venkman/resources/content/venkman-debugger.js