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

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