IFrame根据内容自适应高度

<script language="javascript">function SetIframeHeight(){var iframeMessage=document.getElementById("iframeMessage");if (document.getElementById){if (iframeMessage && !window.opera){if (iframeMessage.contentDocument && iframeMessage.contentDocument.body.offsetHeight){iframeMessage.height = iframeMessage.contentDocument.body.offsetHeight;}else if(iframeMessage.Document && iframeMessage.Document.body.scrollHeight){iframeMessage.height = iframeMessage.Document.body.scrollHeight;}}}}

<iframe src="" id="iframeMessage" onload="Javascript:SetIframeHeight()" width="758" frameborder="0"></iframe>

上面有一个 iframe 的 ID ，大家用的时候别丢了！