模拟鼠标点击

function fakeClick(fn) {
    var $a = $('<a href="#" id="fakeClick"></a>');
    $a.bind("click", function(e) {
          e.preventDefault();
        fn();
    });
    $("body").append($a);
    var evt,el = $("#fakeClick").get(0);
    if (document.createEvent) {
        evt = document.createEvent("MouseEvents");
        if (evt.initMouseEvent) {
            evt.initMouseEvent("click", true, true, window, 0, 0, 0, 0, 0, false, false, false, false, 0, null);
            el.dispatchEvent(evt);
        }
    }
    $(el).remove();
}
var _this = this;
$(function() {
    fakeClick(function() {
        //TODO
    });
});