jQuery脚本在不应该运行函数时运行函数'；不可能

我已经破解了这个jQuery脚本，除了在不应该的时候触发警报之外，一切正常，我不知道为什么

jQuery(document).ready(function(){              
function countDouble() {      

  var d = $("input.double:checked").length;
  var s = $("input.single:checked").length;

    if (s === 1 && d === 2) {

        $("a#proj-btn").attr("href", "#tab2");

    } else {

        $("a#proj-btn").attr("href", "http://www.someurl.com.au/new-cruise-name-home");
        $("#proj-btn").click( function() {
            alert('Please select which projects you are interested in before continuing with enquiry.\nSelect 1 x 1 day project and 2 x 2 day projects by ticking the box beneath your chosen projects.');
        });
    };
}
countDouble();
$(":checkbox").click(countDouble);  
}); 

这是HTML

<ul class="tabs">
    <li class="right"><a id="proj-btn" href="#">NEXT &gt;&gt; Cabin Choice</a></li>
</ul>

因此，当选中1 x.单复选框和2 x.双复选框时，它会将#tab2的URL添加到按钮中，这样可以正常工作。 但选中复选框时，单击按钮后，它也会显示警报3次。仅当未选中复选框时，才会发出警报。

---

我做错了什么？我无法解决此问题

请尝试在每次调用

countDouble（）

时取消绑定“click”，并将

countDouble（）

拉到ready函数之外（可能没有必要）

---

请参阅此表单，以便在函数外部添加事件处理程序：

jQuery(document).ready(function () {
    $("#proj-btn").click(function () {
        alert('Please select which projects you are interested in before continuing with enquiry.\nSelect 1 x 1 day project and 2 x 2 day projects by ticking the box beneath your chosen projects.');
    });

    function countDouble() {
        var d = $("input.double:checked").length;
        var s = $("input.single:checked").length;
        if (s === 1 && d === 2) {
            $("a#proj-btn").attr("href", "#tab2");
        } else {
            $("a#proj-btn").attr("href", "http://www.someurl.com.au/new-cruise-name-home");
        }
    }
    countDouble();
    $(":checkbox").click(countDouble);
});

---

为什么要为

$（“#proj btn”）添加事件处理程序。在该函数中单击（

）？-每次调用它时，它都会再次被添加。这很管用，Michael。当然，现在看起来很明显：）干杯

jQuery(document).ready(function(){              
function countDouble() {      

  var d = $("input.double:checked").length;
  var s = $("input.single:checked").length;

    if (s === 1 && d === 2) {

        $("#proj-btn").unbind("click");//changed
        $("a#proj-btn").attr("href", "#tab2");

    } else {

        $("a#proj-btn").attr("href", "http://www.someurl.com.au/new-cruise-name-home");
        $("#proj-btn").click( function() {
            alert('Please select which projects you are interested in before continuing with enquiry.\nSelect 1 x 1 day project and 2 x 2 day projects by ticking the box beneath your chosen projects.');
        });
    };
}
countDouble();
$(":checkbox").click(countDouble);  
}); 

jQuery(document).ready(function () {
    $("#proj-btn").click(function () {
        alert('Please select which projects you are interested in before continuing with enquiry.\nSelect 1 x 1 day project and 2 x 2 day projects by ticking the box beneath your chosen projects.');
    });

    function countDouble() {
        var d = $("input.double:checked").length;
        var s = $("input.single:checked").length;
        if (s === 1 && d === 2) {
            $("a#proj-btn").attr("href", "#tab2");
        } else {
            $("a#proj-btn").attr("href", "http://www.someurl.com.au/new-cruise-name-home");
        }
    }
    countDouble();
    $(":checkbox").click(countDouble);
});