function m_in(imgObj){
 imgObj.src = imgObj.src.replace("_off","_on");
}
function m_out(imgObj){
 imgObj.src = imgObj.src.replace("_on","_off");
}

 function show_blog_box(){
  document.getElementById("top_address").style.display = "none";
  document.getElementById("bbox").style.display = "block";
 }
 function hide_blog_box(){
  document.getElementById("top_address").style.display = "inline";
  document.getElementById("bbox").style.display = "none";
 }