function change_img(id_tag, tum_url, big_url, width, height, url, title_){

  var pimg = document.getElementById(id_tag);
  
  pimg.src = unescape(tum_url);
  
  
  pimg.onclick = function(){
                       Tip('<img src=\''+unescape(big_url)+'\' />',WIDTH,width,TITLE,unescape(title_),FOLLOWMOUSE,false,CLICKCLOSE,true,FADEIN,300,JUMPVERT,true,JUMPHORZ,true,FIX,['show_here',0,00]);
                     }
  
  /*
  pimg.onclick = function(){
                   window.open(url+'etc/img_viewer.php?img_url='+url+big_url,'img_viewer','menubar=no, status=no, scrollbars=no, menubar=no, width='+(width+10)+', height='+(height+10));
                 }
  */
}