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var arr = [123, 17, 18];

document.oncontextmenu = new Function("event.returnValue=false;"),//禁用右键

window.onkeydown = function (e) {

    var keyCode = e.keyCode || e.which || e.charCode;

    var ctrlKey = e.ctrlKey || e.metaKey;

    console.log(keyCode + "--" + keyCode);

    if (ctrlKey && keyCode == 85) {

        console.log("ctrl+u");

        e.preventDefault();

    }

    if (arr.indexOf(keyCode) > -1) {

        console.log("其他");

        e.preventDefault();

    }

    //e.preventDefault();

    //return false;

}