function rep_img_url(ourl,nurl)
{
var HT = document.getElementsByTagName("img");
var host = window.location.host;
var pathname = window.location.pathname;
pathname = host + pathname.substring(0,pathname.lastIndexOf("/"));
if(navigator.userAgent.indexOf("Firefox")>0){ 
ourl = ourl.replace("[","%5B");
ourl = ourl.replace("]","%5D"); } 
for(var i=0;i<=HT.length-1; i++){
  var nig = HT[i].src.replace(pathname + "/" + ourl,nurl); 
  HT[i].src = nig; 
}}
//rep_img_url("[ws_host]","www.tfwx.net/");
rep_img_url("[ws_host]","pic.tfwx.net/");