function ImgCng(imgnumber) {
	imgurl = "enterprise_message_img/enterprise_message_img"+imgnumber+".jpg";
	document.poster.src=imgurl;

	if (imgnumber == "2007b") {
		imgnumber = "2007";
	}
	if (document.getElementById && document.childNodes) {
		var obj=document.getElementById("posternum");
		obj.childNodes[0].nodeValue=imgnumber;
	}
}