functionName.before("try {")

functionName.after("} catch(ex){
//dostuff
}")

Function.prototype.wrapTry = function(handle) {
    var fn = this;
    return function() {
        try {
            return fn.apply(this, arguments);
        } catch(e) {
            return handle(e);
        }
    };
};

var safeFunction = functionName.wrapTry(doStuff);