JQuery: showing elements with a particular title

I am trying to show only elements that have the title attribute passed to开发者_JAVA技巧 the function:

var selectservice = function(serviceStr) {
    $j("li.project").hide();
    $j("li.project.attr('title').contains(serviceStr)").show();
};

I am not quite sure how to compare the title attribute to the passed string serviceStr? contains doesnt seem to work.

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Use the attribute equals selector, like this:

var selectservice = function(serviceStr) {
    $j("li.project").hide();
    $j("li.project[title='" + serviceStr + "']").show();
};

Note that there are other options for attributes as well, not just equals, like contains, ends with, starts with, etc. See here for a full list.