问在MVC4引用中的jquery自动完成，但不工作或出现在智能感知中

EN

7
Uncaught TypeError: Object function ( selector, context ) {
        // The jQuery object is actually just the init constructor 'enhanced'
        return new jQuery.fn.init( selector, context, rootjQuery );
    } has no method 'curCSS' jquery-ui-1.8.20.js:142

<input type="text" id="titleSearch"  placeholder="Job title e.g ASP.net Developer"/>


            $("#titleSearch").autocomplete({ source: [
                              "C#",
                              "ASP.NET",
                              "Java"
        ] });