IFrame自适应高宽
<iframe id="contentIFrame" name="Content" src="test.html" scrolling="no" frameborder="0" onload="this.height=this.contentWindow.document.body.scrollHeight+5;this.width=this.contentWindow.document.body.scrollWidth+5;" />
IE7中,总有一点不能显现,故在高与宽背面各加了5像素,而能圆满显现