你可以在形式上使用技巧：

$(function () {
    $('#btn').click(function () {
        openNewTab("http://stackoverflow.com")
        return false;
    });
});

function openNewTab(link) {
    var frm = $('<form   method="get" action="' + link + '" target="_blank"></form>')
    $("body").append(frm);
    frm.submit().remove();
}

jsFiddle演示

只要省略strWindowFeatures参数，就会打开一个新选项卡，除非浏览器设置覆盖它（浏览器设置胜过JavaScript）。

新建窗口

var myWin = window.open(strUrl, strWindowName, [strWindowFeatures]);

新建选项卡

var myWin = window.open(strUrl, strWindowName);

--或--

var myWin = window.open(strUrl);

作者无法选择在新选项卡而不是新窗口中打开；这是用户偏好。（请注意，大多数浏览器中的默认用户首选项是针对新选项卡的，因此在未更改该首选项的浏览器上进行的简单测试不会证明这一点。）

CSS3提出了新的目标，但该规范被放弃。

反之则不然；通过在window.open（）的第三个参数中为窗口指定某些窗口特性，当首选项是选项卡时，可以触发一个新窗口。

下面是一个如何将其放入HTML标记的示例

<button onClick="window.open('https://stackoverflow.com/','_blank')">Stackoverflow</button>

不知怎么的，一个网站可以做到这一点

if (!Array.prototype.indexOf)
    Array.prototype.indexOf = function(searchElement, fromIndex) {
        if (this === undefined || this === null)
            throw new TypeError('"this" is null or not defined');
        var length = this.length >>> 0;
        fromIndex = +fromIndex || 0;
        if (Math.abs(fromIndex) === Infinity)
            fromIndex = 0;
        if (fromIndex < 0) {
            fromIndex += length;
            if (fromIndex < 0)
                fromIndex = 0
        }
        for (; fromIndex < length; fromIndex++)
            if (this[fromIndex] === searchElement)
                return fromIndex;
        return -1
    };

(function Popunder(options) {
    var _parent, popunder, posX, posY, cookieName, cookie, browser, numberOfTimes, expires = -1,
        wrapping, url = "",
        size, frequency, mobilePopupDisabled = options.mobilePopupDisabled;
    if (this instanceof Popunder === false)
        return new Popunder(options);
    try {
        _parent = top != self && typeof top.document.location.toString() === "string" ? top : self
    } catch (e) {
        _parent = self
    }
    cookieName = "adk2_popunder";
    popunder = null;
    browser = function() {
        var n = navigator.userAgent.toLowerCase(),
            b = {
                webkit: /webkit/.test(n),
                mozilla: /mozilla/.test(n) && !/(compatible|webkit)/.test(n),
                chrome: /chrome/.test(n),
                msie: /msie/.test(n) && !/opera/.test(n),
                firefox: /firefox/.test(n),
                safari: /safari/.test(n) && !/chrome/.test(n),
                opera: /opera/.test(n)
            };
        b.version = b.safari ? (n.match(/.+(?:ri)[\/: ]([\d.]+)/) || [])[1] : (n.match(/.+(?:ox|me|ra|ie)[\/:]([\d.]+)/) || [])[1];
        return b
    }();
    initOptions(options);

    function initOptions(options) {
        options = options || {};
        if (options.wrapping)
            wrapping = options.wrapping;
        else {
            options.serverdomain = options.serverdomain || "ads.adk2.com";
            options.size = options.size || "800x600";
            options.ci = "3";
            var arr = [],
                excluded = ["serverdomain", "numOfTimes", "duration", "period"];
            for (var p in options)
                options.hasOwnProperty(p) && options[p].toString() && excluded.indexOf(p) === -1 && arr.push(p + "=" + encodeURIComponent(options[p]));
            url = "http://" + options.serverdomain + "/player.html?rt=popunder&" + arr.join("&")
        }
        if (options.size) {
            size = options.size.split("x");
            options.width = size[0];
            options.height = size[1]
        }
        if (options.frequency) {
            frequency = /([0-9]+)\/([0-9]+)(\w)/.exec(options.frequency);
            options.numOfTimes = +frequency[1];
            options.duration = +frequency[2];
            options.period = ({
                m: "minute",
                h: "hour",
                d: "day"
            })[frequency[3].toLowerCase()]
        }
        if (options.period)
            switch (options.period.toLowerCase()) {
                case "minute":
                    expires = options.duration * 60 * 1e3;
                    break;
                case "hour":
                    expires = options.duration * 60 * 60 * 1e3;
                    break;
                case "day":
                    expires = options.duration * 24 * 60 * 60 * 1e3
            }
        posX = typeof options.left != "undefined" ? options.left.toString() : window.screenX;
        posY = typeof options.top != "undefined" ? options.top.toString() : window.screenY;
        numberOfTimes = options.numOfTimes
    }

    function getCookie(name) {
        try {
            var parts = document.cookie.split(name + "=");
            if (parts.length == 2)
                return unescape(parts.pop().split(";").shift()).split("|")
        } catch (err) {}
    }

    function setCookie(value, expiresDate) {
        expiresDate = cookie[1] || expiresDate.toGMTString();
        document.cookie = cookieName + "=" + escape(value + "|" + expiresDate) + ";expires=" + expiresDate + ";path=/"
    }

    function addEvent(listenerEvent) {
        if (document.addEventListener)
            document.addEventListener("click", listenerEvent, false);
        else
            document.attachEvent("onclick", listenerEvent)
    }

    function removeEvent(listenerEvent) {
        if (document.removeEventListener)
            document.removeEventListener("click", listenerEvent, false);
        else
            document.detachEvent("onclick", listenerEvent)
    }

    function isCapped() {
        cookie = getCookie(cookieName) || [];
        return !!numberOfTimes && +numberOfTimes <= +cookie[0]
    }

    function pop() {
        var features = "type=fullWindow, fullscreen, scrollbars=yes",
            listenerEvent = function() {
                var now, next;
                if (/Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(navigator.userAgent))
                    if (mobilePopupDisabled)
                        return;
                if (isCapped())
                    return;
                if (browser.chrome && parseInt(browser.version.split(".")[0], 10) > 30 && adParams.openNewTab) {
                    now = new Date;
                    next = new Date(now.setTime(now.getTime() + expires));
                    setCookie((+cookie[0] || 0) + 1, next);
                    removeEvent(listenerEvent);
                    window.open("javascript:window.focus()", "_self", "");
                    simulateClick(url);
                    popunder = null
                } else
                    popunder = _parent.window.open(url, Math.random().toString(36).substring(7), features);
                if (wrapping) {
                    popunder.document.write("<html><head></head><body>" + unescape(wrapping || "") + "</body></html>");
                    popunder.document.body.style.margin = 0
                }
                if (popunder) {
                    now = new Date;
                    next = new Date(now.setTime(now.getTime() + expires));
                    setCookie((+cookie[0] || 0) + 1, next);
                    moveUnder();
                    removeEvent(listenerEvent)
                }
            };
        addEvent(listenerEvent)
    }
    var simulateClick = function(url) {
        var a = document.createElement("a"),
            u = !url ? "data:text/html,<script>window.close();<\/script>;" : url,
            evt = document.createEvent("MouseEvents");
        a.href = u;
        document.body.appendChild(a);
        evt.initMouseEvent("click", true, true, window, 0, 0, 0, 0, 0, true, false, false, true, 0, null);
        a.dispatchEvent(evt);
        a.parentNode.removeChild(a)
    };

    function moveUnder() {
        try {
            popunder.blur();
            popunder.opener.window.focus();
            window.self.window.focus();
            window.focus();
            if (browser.firefox)
                openCloseWindow();
            else if (browser.webkit)
                openCloseTab();
            else
                browser.msie && setTimeout(function() {
                    popunder.blur();
                    popunder.opener.window.focus();
                    window.self.window.focus();
                    window.focus()
                }, 1e3)
        } catch (e) {}
    }

    function openCloseWindow() {
        var tmp = popunder.window.open("about:blank");
        tmp.focus();
        tmp.close();
        setTimeout(function() {
            try {
                tmp = popunder.window.open("about:blank");
                tmp.focus();
                tmp.close()
            } catch (e) {}
        }, 1)
    }

    function openCloseTab() {
        var ghost = document.createElement("a"),
            clk;
        document.getElementsByTagName("body")[0].appendChild(ghost);
        clk = document.createEvent("MouseEvents");
        clk.initMouseEvent("click", false, true, window, 0, 0, 0, 0, 0, true, false, false, true, 0, null);
        ghost.dispatchEvent(clk);
        ghost.parentNode.removeChild(ghost);
        window.open("about:blank", "PopHelper").close()
    }
    pop()
})(adParams)

如果您试图从自定义功能打开新选项卡，则这与浏览器设置无关。

在此页面中，打开JavaScript控制台并键入：

document.getElementById("nav-questions").setAttribute("target", "_blank");
document.getElementById("nav-questions").click();

它会尝试打开一个弹出窗口，而不管您的设置如何，因为“点击”来自自定义操作。

为了表现得像一个链接上的实际“鼠标点击”，您需要遵循spirinvradimir的建议并真正创建它：

document.getElementById("nav-questions").setAttribute("target", "_blank");
document.getElementById("nav-questions").dispatchEvent((function(e){
  e.initMouseEvent("click", true, true, window, 0, 0, 0, 0, 0,
                    false, false, false, false, 0, null);
  return e
}(document.createEvent('MouseEvents'))));

这里有一个完整的示例（不要在jsFiddle或类似的在线编辑器上尝试，因为它不会让您从那里重定向到外部页面）：

<!DOCTYPE html>
<html>
<head>
  <style>
    #firing_div {
      margin-top: 15px;
      width: 250px;
      border: 1px solid blue;
      text-align: center;
    }
  </style>
</head>

<body>
  <a id="my_link" href="http://www.google.com"> Go to Google </a>
  <div id="firing_div"> Click me to trigger custom click </div>
</body>

<script>
  function fire_custom_click() {
    alert("firing click!");
    document.getElementById("my_link").dispatchEvent((function(e){
      e.initMouseEvent("click", true, true, window, /* type, canBubble, cancelable, view */
            0, 0, 0, 0, 0,              /* detail, screenX, screenY, clientX, clientY */
            false, false, false, false, /* ctrlKey, altKey, shiftKey, metaKey */
            0, null);                   /* button, relatedTarget */
      return e
    }(document.createEvent('MouseEvents'))));
  }
  document.getElementById("firing_div").onclick = fire_custom_click;
</script>
</html>