$(".content").on("contextmenu"  , function(e) {
        e.preventDefault();
        return false;
    })
    $(".content").on("mousedown" , ".list" , function(e) {
        console.log(e.which);
        if (3 == e.which) {  //右键为3
            console.log("右击")
        } else if (1 == e.which) {
            console.log("左击")
        }
    });