function nb(oldname,findText,replaceText, info) {
var str2;
str2 = oldname.replace (findText, replaceText);
 document.getElementById('td_content').innerHTML = info;  
  return str2;
} 

function thispic(img_name,img_src, info) {
  document[img_name].src=nb(img_src,"_s.jpg",".jpg", info);
}

//---------------

function menu(s) {
  document.getElementById('menu').innerHTML=s;
} 

function chpic(s) {
  document.getElementById('menu').innerHTML=s;
} 

function thispic(img_name,img_src, info) {
  document[img_name].src=nb(img_src,"_s.jpg",".jpg", info);
}