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我在一个简单的脚本上遇到了一个小问题它只对两个应用了一个类名。这是我的代码。在此先感谢所有社区，请原谅一个法国人的英语不好:-)！

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style>
    .alpha{
        font-weight: bold;
        font-size: 20px;
    }
</style>
</head>
<body onload="RemoveClass('alpha','alpha')">
<div class="myclass alpha">Lorem ipsum.</div>
<div class="myclass alpha">Fuga, cum!</div>
<div class="myclass alpha">Lorem ipsum.</div>
<div class="myclass alpha">Lorem ipsum.</div>
<div class="myclass alpha">Lorem ipsum.</div>
<div class="myclass alpha">Sed, ducimus!</div>
<div class="myclass alpha">Veritatis, id.</div>
<div class="myclass alpha">Lorem ipsum.</div>
<div class="myclass alpha">Lorem ipsum.</div>
<div class="myclass alpha">Ullam, soluta.</div>

<script type="text/javascript">
    function AddClass(elem, ClassSupp){
        var Selection = document.getElementsByClassName(elem);
        for (var i = 0; i < Selection.length; i++) {
            if (Selection[i].className.indexOf(ClassSupp) == -1){
                Selection[i].className = Selection[i].className + " " + ClassSupp;
            }
        }
    }
    function RemoveClass(elem, ClassSupp){
        var Selection = document.getElementsByClassName(elem);
        for (var i = 0; i < Selection.length; i++) {
            Selection[i].className = "Test";
        }
    }
</script>

</body>
</html>
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