无法输入<input>标签

Question

我目前正在尝试在我的网站首页上创建一个表单.但是,我有问题能够在输入框中输入.在绝对定位中,光标不会显示.当我将定位从绝对更改为相对时,我不再有这个问题.不幸的是,当我这样做时,它会移动我所有其他元素.有没有办法绕这个,所以标签不会移动我的其他元素,以及能够输入到这个输入框？

HTML:

<div id="wrapper">
    <div class="header">
        <div id="head_login">
            Login
            <div id="arrow-down"></div>
        </div>
    </div>
    <div id="head_break"></div>
    <div class="content_splash">
        <form>
        **<input type="text" id="firstname" /></form>**
        <div id="vertical_one"></div>
        <div id="vertical_two"></div>
        <p id="OR"> OR </p>
        <div id="facebook_login"><img src="{% static 'home/facebook_login.gif' %}" /></div>
    </div>
    <div id="content_break"></div>
    <div class="content_description">
    <h2> What is the Title? </h2>
    </div>
    <div id="content_description_break"></div>
    <div class="content_howitworks">
    <h2> How it Works.</h2>
    </div>
    <div id="footer_break"></div>
</div>

CSS:

content_splash{
    position: relative;
    margin-top: 30px;
    height: 500px;
    border: 1px solid black;
}
.content_splash input{
    -webkit-border-radius: 10px;
    -moz-border-radius: 10px;
    border-radius: 10px;

}
.content_splash #firstname{
    position: absolute;
    margin-top: 200px;
    width: 170px;
    height: 25px;
}
.content_splash #vertical_one{
    position: absolute;
    width: 1px; 
    height: 60px;
    margin-left: 310px;
    margin-top: 298px;
    background: black;
}
.content_splash #vertical_two{
    position: absolute;
    width: 1px; 
    height: 60px;
    margin-left: 310px;
    margin-top: 380px;
    background: black;
}
.content_splash #OR{
    position: absolute;
    padding-top: 346px;
    padding-left:300px;
    color: black;
}
.content_splash #facebook_login{
    position: absolute;
    padding-top: 350px;
    padding-left: 350px;

}
#content_break {
    margin-top: 20px;
    height: 1px;
    background: black;
    background: -webkit-gradient(linear, 0 0, 100% 0, from(#e2e3e4), to(#e2e3e4), color-stop(50%, black));  
}
.content_description{
    margin-top: 20px;
    height: 400px;
}
.content_description h2{
    font-size: 40px;
    font-family: Trebuchet MS;
    padding-left: 30px;
    color: #a2caf6;
}
#content_description_break {
    margin-top: 20px;
    height: 1px;
    background: black;
    background: -webkit-gradient(linear, 0 0, 100% 0, from(#e2e3e4), to(#e2e3e4), color-stop(50%, black));  
}
.content_howitworks{
    margin-top: 20px;
    height: 400px;
}
.content_howitworks h2{
    font-size: 40px;
    font-family: Trebuchet MS;
    padding-left: 30px;
    color: #a2caf6;
}

Answer 1

在输入中添加z-index.

.content_splash #firstname{
    position: absolute;
    margin-top: 200px;
    width: 170px;
    height: 25px;
    z-index: 1;
}

例

编辑

根据@gaitat的要求,我将解释为什么这样做.

假设以下HTML:

<div class="parent">
    I am the parent.

    <div class="child red">I am the red child.</div>

    <div class="child blue">I am the blue child.</div>

    <div class="child green">I am the green child.</div>
</div>

现在,还假设以下css:

.parent
{
    position: relative;
}

.child
{
    position: absolute;
    padding: 5px;
}

.red
{
    background-color: red;
}

.blue
{
    background-color: blue;
}

.green
{
    background-color: green;
}

在这里查看JSFiddle

正如您所看到的,在DOM中,绿色子项是父项的最后一个子项,因此它最后呈现.假设绝对位置且未z-index使用,最后一个渲染元素将呈现在顶部.

现在,当我们向红色子项添加z-index时:

.red
{
    background-color: red;
    z-index: 1;
}

您将看到红色子项将呈现在顶部,因为他的z-index高于其他z-index为0的子项(默认值).请参阅此处显示的JSFiddle.

请记住,这只适用于共享同一直接父母的兄弟姐妹,否则不会.