<style> .docBg { width:100%; height:100%; position:fixed; left:0; top:0; z-index:-1; _position:absolute; /* IE6 */ _top:expression(eval(document.documentElement.scrollTop)); /* IE6 */ } </style> <!-- ------------------------------------------------------- --> <div class="docBg"> <img class="bg" src="images/bg.jpg" style="width:100%; height: auto;" alt="页面背景"/> </div>
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