Bind value of elements

Can i execute custom function when some properties of html tag is changed?

For example:

HTML code

<a id="link1">title</a>
<a id="link2">title</a>

When we change link2 text i want to change link1 text. So i want something like DataBinding in Windows Presentat开发者_C百科ion Foundation.

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We are changing link2: $('#link2').text('blablablaballba'); and value of link1 must be "blablablaballba". I dont want to write additional code $('#link1').text('blablablaballba'); and so on. link1 must be changed automatically.

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You can write:

$('#link2, #link1').text('blablablaballba');

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You can use a periodic interval to check the contents, like:

var timerID;

function watchLink2() {
    var el = document.getElementById("link2");

    return function () {
        if (el.innerHTML != "title") {
            document.getElementById("link1").innerHTML = el.innerHTML;
            clearInterval(timerID);
        }
    };
}

timerID = setInterval(watchLink2(), 200);

But, er..., how do you think the attribute's value is changed?