function open_window(name, url, left, top, width, height, toolbar, menubar, statusbar, scrollbar, resizable)
{
  var winRef;
  toolbar_str = toolbar ? 'yes' : 'no';
  menubar_str = menubar ? 'yes' : 'no';
  statusbar_str = statusbar ? 'yes' : 'no';
  scrollbar_str = scrollbar ? 'yes' : 'no';
  resizable_str = resizable ? 'yes' : 'no';

  winRef = window.open(url, name, 'left='+left+',top='+top+',width='+width+',height='+height+',toolbar='+toolbar_str+',menubar='+menubar_str+',status='+statusbar_str+',scrollbars='+scrollbar_str+',resizable='+resizable_str);
  
  if(window.focus){winRef.focus()};
}

function preload_img()
{ 
  var img_list = preload_img.arguments;
  if (document.preloadlist == null) 
    document.preloadlist = new Array();
  var top = document.preloadlist.length;
  for (var i=0; i < img_list.length-1; i++) {
    document.preloadlist[top+i] = new Image;
    document.preloadlist[top+i].src = img_list[i+1];
  } 
}

function change_img_src(name, nsdoc, rpath, preload)
{ 
  var img = eval((navigator.appName.indexOf('Netscape', 0) != -1) ? nsdoc+'.'+name : 'document.all.'+name);
  if (name == '')
    return;
  if (img) {
    img.altsrc = img.src;
    img.src    = rpath;
  } 
}

function restore_img_src(name, nsdoc)
{
  var img = eval((navigator.appName.indexOf('Netscape', 0) != -1) ? nsdoc+'.'+name : 'document.all.'+name);
  if (name == '')
    return;
  if (img && img.altsrc) {
    img.src    = img.altsrc;
    img.altsrc = null;
  } 
}