function reImgSize(id,max){ 
	var await = document.getElementById(id);
	var imgall = await.getElementsByTagName("img");
	for (i=0;i<imgall.length;i++){ 
		if (imgall[i].width>max){ 
			var oWidth=imgall[i].width;
			var oHeight=imgall[i].height;
			imgall[i].width=max;
			imgall[i].height=oHeight*max/oWidth;
		}
	}
}
reImgSize('xinwenneirong',600);