var dyniframe = document.getElementsByTagName("iframe");
function dyniframesize() {
	for (i = 0; i < dyniframe.length; i++) {
		if (dyniframe[i] && !window.opera) {
			dyniframe[i].style.display = "block";
			if (dyniframe[i].contentDocument
					&& dyniframe[i].contentDocument.body.offsetHeight) //如果用户的浏览器是NetScape 
				dyniframe[i].height = dyniframe[i].contentDocument.body.offsetHeight;
			else if (dyniframe[i].Document
					&& dyniframe[i].Document.body.scrollHeight) //如果用户的浏览器是IE 
			{
				dyniframe[i].height = dyniframe[i].Document.body.scrollHeight;
			}
		}
	}
}
if (window.addEventListener) {
	window.addEventListener("load", dyniframesize, false);
} else if (window.attachEvent) {
	window.attachEvent("onload", dyniframesize);
} else {
	window.onload = dyniframesize;
}