var currUrl = window.location.href;
   var currStyle = function (links){
     links.each(function(){
        var url = $(this).attr('href');
        if (currUrl.indexOf(url) != -1){
          $(this).addClass("current");
          return false;
        }
     });
}

$(function(){
  currStyle($("#sidebar .list a"));
})

document.getElementById("myId").setAttribute("href","www.xxx.com"); 
document.getElementById("myId").href = "www.xxx.com"; 

$("#myId").attr("href","www.xxx.com");