<div class ="req">
   <button class="menu_btn" id="table-btn"><a href="/page.php" id="link1">Link</a></button>

</div>

$(document).ready(function(){

$('.req').delegate("button","click",function () {
    var url = $(this).find('a').attr('href');
alert(url);

    if (url !== undefined) { // require a URL
            alert(url); // redirect
        }
        return false;
    });

});