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Center Text inside background image using CSS

I have a website with a backgroundimage in a <div> element that has another <div> element with text inside it. Since the text changes, I need to center it dynamically. So far I have this, but it is still left aligned:

<html>
  <head>
    <title>3D Text</title>
<script> sets the text dynamically</script>
<style>

#Layer {
    width: 320px;
    height: 480px; 
    position: absolute; 
    border-style: none;
    top: 0px; 
    left: 0px;
    z-index: 0;
    }

#clock {
    position: relative;
    font-family: Helvetica Neue;
    color: black;
    font-size: 80px;
    text-align: center;
    opacity: 1;
    float: left;
}

.stretch {
    width:100%;
    height:100%;
} 




</style>

</head>

<body onload="onLoad()">

        <div id="Layer"><img src="bg2.png" class="stretch"/></div> 

            <div  id="clock">
                <script language="JavaScript">setText(); setInterval("setText()", 1000 )</script>开发者_如何学编程;
            </div>  

</body>
</html>


Your clock div is not inside the Layer div.

Try this:

<html>
  <head>
    <title>3D Text</title>
<script> sets the text dynamically</script>
<style>

#Layer {
    width: 320px;
    height: 480px;
    border-style: none;
    background-image: url(bg2.png);
    }

#clock {
    font-family: Helvetica Neue;
    color: black;
    font-size: 10px;
    text-align: center;
    opacity: 1;
}

.stretch {
    width:100%;
    height:100%;
}




</style>

</head>

<body onload="onLoad()">

        <div id="Layer">

            <div  id="clock">
              12:00PM
            </div>  
</div>
</body>
</html>


Because you are using float: left. A floating element only uses the space it needs.

You will have to set the width property on #clock to make this work.


I believe you have to a have a width set for your div for it to align the text

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