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<script>$("html").css("font-size", 20 * ($(window).width() / 640) + 'px');</script>
<script>
    window.onload = function() {
        var arrIcon = ['images/1.jpg', 'images/2.jpg'];
        var num = 0; //控制头像改变
        var iNow = -1; //用来累加改变左右浮动
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        var btn = $('#btn')[0];
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