//<!-- 首先放一个div，用做loading效果 -->
//<!-- src 里面放你想要的网页-->
function startload(loadstr, iframestr) {
	var loadstr = loadstr;
	var iframestr = iframestr;

	iframestr.style.display = "none"; //隐藏 
	loadstr.style.display = "block"; //显示

	if (window.ActiveXObject) {
		iframestr.onreadystatechange = function() {
			if (this.readyState == "complete") {// 解释：一个iframe加载完毕的状态是complete,就象xmlhttp里的那个==4一样,这些都是规定的...
				loadstr.innerHTML = "load complete!";
				loadstr.style.display = "none";
				iframestr.style.display = "block";
			}
		}
	} else {
		iframestr.style.display = "block"; //隐藏 
		loadstr.style.display = "none"; //显示
	}

}
//iframe自适应加载页面高度-js实现