JQuery中回车键登陆

//点击回车键
//王东升/2015/3/11
document.onkeydown = function (event) {
    var e = event ? event : (window.event ? window.event : null);
    if (e && e.keyCode == ) { // enter 键
        //登录
        wds_logintongji();登陆方法
    }
};