Question

这很奇怪。我有一个3个div内的输入按钮，其中最外面的id为“容器”。当我设置“容器”的高度时，当我点击输入id'ed为“switch”和“next”时，不会触发任何动作。但是，当我没有为#container设置高度时，单击操作确实有效。是什么造成的？谢谢！我的html和css在下面。

HTML

<!DOCTYPE html>
<html>
<head>
    <meta http-equiv:"Content-Type" content="text/html; charset=ISO-8859-1" />
    <script text="text/Javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
    <script type="text/Javascript" src="jquery.js"> </script>

    <link href='http://fonts.googleapis.com/css?family=Droid+Sans+Mono' rel='stylesheet' type='text/css'>

    <link rel="stylesheet" type="text/css" href="jquery_home.css">


    <title> jquery home </title>


</head>
<body>

<div id="container"> 

    <h1 style="position: relative; top: 10%; width: 300px; margin-left: auto; margin-right: auto"> Learn jQuery </h1>

<div id="q_and_a_container" style="text-align: center">
    <div style="width: 200px; margin-left: auto; margin-right: auto; text-align: center" id="qa" height="500px"> Nate</div>
    <input type="submit" id="switch" value="See Answer" /> 
    <input type="submit" id="next" value="Next Question" />


</div>

<div id="answer_container">
    <textarea id="answer_here"> </textarea>
</div>

</div>

<div id="another_container" style="width: 300px; margin-left: auto; margin-right: auto; text-align: center">

    <h2 style="font-family: 'Chalk'">
<a href="add_question.html">Add question </a> </h2>

</div>





</body>

</html>

CSS

@font-face {
    font-family: "Chalk";
    src: url("../../font/KGSecondChancesSketch.ttf");
}

h1 {
    font-family: "Chalk";
}

html, body {
    height: 100%;
    margin: 0;
}

#container {
    width: 100%;
    height: 50%;
}

body {
    background-image: url(../../../img/compressedbgs/chalkboard.jpg);
    background-size: 100% 100%;
    background-repeat: repeat-x;
}


#q_and_a_container {
    height: 50%;
    position: relative;
    float: left;
    top: 25%;
    left: 2%;
    width: 45%;
    margin: 1%;
    background-color: rgba(255, 255, 255, 0.1);

    -webkit-box-shadow: 0px 0px 12px rgba(0,0,0,0.4);
    -moz-box-shadow: 0px 1px 6px rgba(23, 69, 88, .5);
    -webkit-border-radius: 12px;
    -moz-border-radius: 7px;
    border-radius: 7px;

    background: -webkit-gradient(linear, left top, left bottom,
        color-stop(0% white), color-stop(15%, white), 
            color-stop(100%, #D7E9F5));
    background: -moz-linear-gradient(top, white 0%, white 55%, #D5E4F3);
    z-index: 45;
}

div#qa {
    position: relative;
    top: 25%;
    height: 75%;
    z-index: 50;
}

#answer_container {
    position: relative;
    float: left;
    height: 50%;
    top: 25%;
    left: 2%;
    width: 45%;
    background-color: rgba(0,0,0,0.1);
    margin: 1%;
    border: none;
    -webkit-border-radius: 12px;
    -moz-border-radius: 7px;
    border-radius: 7px;
}

input {
    width: 107px;
    margin-left: auto;
    margin-right: auto;
    background-color: rgba(255, 255, 255, 0.1);
    -webkit-border-radius: 7px;
    -moz-border-radius: 7px;
    border-radius: 7px;
    font-family: 'Droid Sans Mono';
    z-index: 1000;
}

textarea {
    color: white;
    font-family: "Droid Sans Mono";
    width: 100%;
    height: 100%;
    border: none;
    -webkit-border-radius: 12px;
    -moz-border-radius: 7px;
    border-radius: 7px;
    background-color: rgba(0,0,0,0.1);
    -moz-appearance: none;
    font-size: medium;
}

textarea:focus {
    outline: none;
    border: none;
}

#add_question {
    clear: both;
}

a {
    text-decoration: none;

}

a:visited {
    color: black;
}

JS：

$(document).ready(function() {

    var question_number = 1;
    var tempText;
    var qno;


    $(document).on("click", "#switch", function(event) {
        if ($("#switch").val() == "See Answer") {
            tempText = $("#qa").text();
            $("#qa").text("");
            qno = "" + question_number;
            qno = "#" + qno;

            $.ajax({
                url: "answers.html",
                datatype: "html",
                success: function(data) {
                    $("#qa").html($(data).filter(qno).text());
                },
                error: function(r) {
                    alert("whoops, error in ajax request");
                }
            }); // end AJAX request

            // change value
            $("#switch").val("See Question");
        } else {

            temptText = $("#qa").text();
            $("#qa").text("");
            qno = "" + question_number;
            qno = "#" + qno;

            $("#qa").text(tempText);            
            $("#switch").val("See Answer");
            }
    });

    $(document).on("click", "#next", function(event) {
        question_number = question_number + 1;
        qno = "" + question_number;
        qno = "#" + qno;

        $.ajax({
            url: "questions.html",
            datatype: "html",
            success: function(data) {
                $("#qa").text($(data).filter(qno).text());
            },
            error: function(r) {
                alert("whoops, error in ajax request for next question");
            }
        }); // end AJAX request
    });

    $("textarea").keydown(function(e) {
    if(e.keyCode === 9) { // tab was pressed
        // get caret position/selection
        var start = this.selectionStart;
        var end = this.selectionEnd;

        var $this = $(this);
        var value = $this.val();

        // set textarea value to: text before caret + tab + text after caret
        $this.val(value.substring(0, start)
                    + "\t"
                    + value.substring(end));

        // put caret at right position again (add one for the tab)
        this.selectionStart = this.selectionEnd = start + 1;

        // prevent the focus lose
        e.preventDefault();
    }
});


})

Answer 1

原因是因为div的z-index将其定位在输入之上。您已在输入上设置了z-index，但因为它们是静态元素，所以会被忽略。

将position:relative;添加到输入中，它们将被带到前面。

Answer 2

您的div#qa将与按钮重叠。 div#qa有z-index: 50;。将其更改为-1将使您可以点击按钮。

div#qa {
    height: 75%;
    position: relative;
    top: 25%;
    z-index: -1;
}

检查Fiddle here.

Answer 3

由于你的2个按钮之前的div（id =“qa”）而发生了这种情况。你已经提到宽度为200px，高度为500px，这也使它覆盖了按钮。同样，你的z-index为50，这使它成为你按钮的顶部。

你可以做两件事，

将z-index设为某个值，以便div位于按钮层之后（如果您希望div具有相同的大小）

前 -

z-index : -50;

或者你可以减小div和上边距的大小，使得按钮在div之后出现。

前 -

top : 5%;
height : 200px;

设置div容器的高度禁用单击div内部？

3 个答案: