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.anniu {
        background-attachment: fixed;
        background-image: url(imges/圖片地址.gif);
        background-repeat: no-repeat;
        height: 100px;
        width: 200px;
}

<input type="submit" name="Submit" value="提交" class="anniu" />

或者直接用：

<input type="image" src="圖片地址.jpg" />