Javascript / jQuery Exec turns up Null

How do I skip over this next line if it turns out to be null? Currently, it (sometimes) "breaks" and prevents the script from continuing.

开发者_StackOverflow中文版

var title = (/(.*?)</title>/m).exec(response)[1];

$.get(url, function(response){
    var title = (/<title>(.*?)<\/title>/m).exec(response)[1];
    if (title == null || title == undefined){
        return false;
    }
    var words = title.split(' ');
    $.each(words, function(index, value){
        $link.highlight(value + " ");
        $link.highlight(" " + value);
    });
 });        

---

$.get(url, function(response){
    var title = (/<title>(.*?)<\/title>/m).exec(response);
    if (!title || !title[1]){
        return false;
    }
    title=title[1];
    var words = title.split(' ');
    $.each(words, function(index, value){
        $link.highlight(value + " ");
        $link.highlight(" " + value);
    });
 });

You must check that title is not null before you get the result at index 1