jquery - Read a text file?

I have an html file that I'd like to open and read from, but I'm not entirely sure how to do that... Basically, it's a fairly large file (big.html), and, in a separate file (titles.html), I have some jquery code that I'd like to use to find certain elements (namely, h2 tags) and get the inner text from those tags and w开发者_JAVA百科rite just that text to titles.html... I'm not sure, particularly, how to open a separate file and read from it, and secondly, I'm not sure if the code below will work when it comes to getting the text within the h2 tags...

$(document).ready(function() {
    $("h2").each(function() {
        var title = $(this).text();
        $("#mydiv").append(title);
    });
});

...

<div id="mydiv"></div>

I'm a bit confused how to do that with jquery... I'm pretty new to the whole thing, so I'm not even sure it's possible...

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jQuery provides a method $.get which can capture the data from a URL. So to "read" the html/text document, it needs to be accessible through a URL. Once you fetch the HTML contents you should just be able to wrap that markup as a jQuery wrapped set and search it as normal.

Untested, but the general gist of it...

var HTML_FILE_URL = '/whatever/html/file.html';

$(document).ready(function() {
    $.get(HTML_FILE_URL, function(data) {
        var fileDom = $(data);
        fileDom.find('h2').each(function() {
            alert($(this).text());
        });
    });
});

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One solution would be to "read" in the 2nd document by putting it in a hidden iframe. Then you could access the HTML in that iframe as noted here and do whatever you like with that data.