function setIframeHeight(iframe) {
if (iframe) {
var iframeWin = iframe.contentWindow || iframe.contentDocument.parentWindow;
if (iframeWin.document.body) {
iframe.height = iframeWin.document.documentElement.scrollHeight || iframeWin.document.body.scrollHeight;
}
}
};
window.onload = function () {
setIframeHeight(document.getElementById(\'external-frame\'));
};
或者调用： <iframe src=" " frameborder="0" scrolling="no" id="external-frame" onload="setIframeHeight(this)"></iframe>