function hotelbooking(hotelid,campaign_id,txtindate,txtoutdate){
var width="970" //设置iframe的宽度
var height="2000" //设置iframe的高度
document.write("<iframe frameborder=0 scrolling=no height="+height+" width="+width+" src='http://travel.elong.com/HOTEL/detail_cn_"+hotelid+".html?campaign_id="+campaign_id+"&txtindate="+txtindate+"&txtoutdate="+txtoutdate+"'></iframe>")
}