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  • select下拉框,设置不被选择方式

    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
    <html>
    <head>
    <title> New Document </title>
    <meta name="Generator" content="EditPlus">
    <meta name="Author" content="">
    <meta name="Keywords" content="">
    <meta name="Description" content="">
    </head>

    <body>
    <select>
    <option value="">1</option>
    <option value="">2</option>
    <optgroup label="3"></optgroup>
    <optgroup label="4"></optgroup>
    <optgroup label="5"></optgroup>
    </select>
    </body>
    </html>

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  • 原文地址:https://www.cnblogs.com/hpp0716/p/6738467.html
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