Iframe自适应高度（iframe中包含一个图片）

<script type="text/javascript">
//Iframe自适应高度
function iFrameHeight(iframepage) {   
	var ifm= document.getElementById(iframepage);   
	var subWeb = document.frames ? document.frames[iframepage].document : ifm.contentDocument;   
	if(ifm != null && subWeb != null) {
		var image = new Image();
		image.src = subWeb.getElementById("image").src;
		image.onreadystatechange=function(){
			 if (image.readyState=="complete") {
			  	ifm.height = subWeb.body.scrollHeight + image.height;
			 }
		}
	}   
} 
</script>

<iframe id="process_img"  scrolling="no" onload=iFrameHeight('process_img') frameBorder=0 src="viewProcessImage.action?processInstanceId=<s:property value="task.executionId"/>"></iframe>